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 Changes of Sylpheed
 * 3.2.0beta6 (development)
     * The blinking period of the tray icon was extended to 10 seconds.
     * New plug-in signals were added.
     * 'Is shorter than' became the default for 'Age' filter condition.
     * News (NNTP) now supports SOCKS proxy.
     * A bug that filter settings were lost if Escape key was pressed
       quickly on auto filter creation was fixed.
     * Other bugfixes were made.
     * Win32: OpenSSL was updated to 0.9.8t (security fix).
     * Win32: included libpng library was updated to 1.2.47 (security fix).
     * Win32: included curl executable was updated to 7.24.0.
 * 3.2.0beta5 (development)
     * The POP3 remote mailbox now supports SOCKS proxy.
     * The POP3 remote mailbox now retrieves headers from the newer messages
       (useful for slow connection).
     * The POP3 remote mailbox can now reload message headers after the loading
       is stopped.
     * The previous change of the message view (always show the message view
       on startup) was reverted except for vertical view mode.
     * The crash bug that occurred when IMAP message fetching and new message
       checking happened at the same time was fixed.
 * 3.2.0beta4 (development)
     * Multiple keywords search of the quick search was implemented.
     * Sylfilter command was added as a preset of junk filter program.
     * MIME debug output was modified.
     * On browsing IMAP folder, the error "imap_cmd_gen_send: cannot send
       command because another command is already running." was fixed.
     * The focus on quick search entry is not stolen by the refresh of summary.
     * Both filtered and original numbers of messages are displayed on the
       status label now.
     * Always show the message view on startup (fixes wrong view size on
       vertical-view mode).
 * 3.2.0beta3 (development)
     * The translation was updated.
     * The Japanese manual was updated.
     * Win32: included GTK+ MS-Windows theme engine (libwimp.dll) was updated
       to fix potential DLL loading vulnerability. Other parts of
       GTK+ (2.10.14) are not affected.
     * Win32: included libpng library was updated to 1.2.46 (security fix).
 * 3.2.0beta2 (development)
     * The performance of reading cache files was improved by using memory
       mapped file (requires GTK+ >= 2.8).
     * 'Account Preferences - Advanced - Put deleted messages in' account
       setting actually works now.
     * Style colors are used for attachment label widgets now.
     * The text color of quick search on dark themes was fixed.
     * The HTML parser was modified.
 * 3.2.0beta1 (development)
     New features
       * Each attachments on the message view now have graphical label and
         popup menu.
       * Win32: IPv6 support on Windows XP or later was enabled again.
         (This time, it will also work on Windows 2000 (IPv4 only support))
     Improvements
       * Number of maximum characters per line of configuration files was
         increased.
       * Compose window will not be closed if saving of message to outbox
         failed.
       * Sender's e-mail address became not guessable from generated Message-Id.
       * New plug-in APIs were added.
     Bugfixes
       * The crash bug that was caused by offline switch while IMAP session was
         active was fixed.
       * Queue control headers are removed when moving messages from queue
         folders to trash.
       * Duplicated keyboard accelerators on some dialogs were fixed.
       * Fixed a memory leak.
     Other changes
       * Many alloca() calls were removed.
       * Win32: the updater executables were not included in the zip version
         anymore to prevent incorrect update.
 * 3.1.1 (stable)
     * The column width of the address book will be saved now.
     * The keyboard shortcut of 'File/Send' menu of compose window was changed
       to prevent accidental sending.
     * The bug that caused occasional crash when summary was updated while
       receiving messages was fixed.
     * The compilation problem on some environment was fixed.
     * Some locale problems on Mac OS X was fixed.
     * The compilation error on newer gcc was fixed.
     * Finnish translation was added.
 * 3.1.0 (stable)
     * Copyright year was updated.
     * A compiler warning was removed.
     * The return value of procmime API was fixed.
 * 3.1.0rc (release candidate)
     * Junk-filtered or trashed messages are not counted as new on mail
       receiving.
     * Show error dialog if junk mail filter command exit with fatal error.
     * The long-standing bug in undo/redo was fixed.
     * The bug that caused crash if the quick search was executed while folder
       tree was empty was fixed.
 * 3.1.0beta7 (development)
     * 'Reply to this address' was added to the e-mail address context menu.
     * The default boolean type of query search and filter condition became AND.
     * The matching algorithm of filtering was optimized (time-consuming
       conditions will be evaluated later).
     * The option not to display the send progress dialog was added.
     * Move/copy marks are now preserved on folder refresh when immediate
       execution is off.
     * Build revision number was added to the about dialog.
     * The bug that wrong unread message number was displayed after mail
       receiving if 'Open inbox after receiving new mail' was enabled was fixed.
     * Win32: The parameter for automatic update URL is properly added now.
     * Win32: The wabread.exe executable that was missing on the previous
       release was included. The automatic import of Windows Address Book
       (WAB) file on initial startup actually works since this release.
     * The Japanese manual was updated.
 * 3.1.0beta6 (development)
     * A new option 'Set only mail address when entering recipient from address
       book' was added.
     * The menu items 'Add to recipient/Cc/Bcc' were added to the address book.
     * On junk mail filtering, appropriate Junk folder for accounts will be
       selected.
     * When going offline, all current network sessions will be disconnected.
     * Low priority will be used for long timeout interval.
     * The behavior on opening folders and mark-read timing was modified again.
     * The HTML parser was fixed to handle 'a' tag correctly.
     * Win32: The text font setting will be checked always on startup
       (Japanese locale only).
     * The Japanese manual was updated.
 * 3.1.0beta5 (development)
     * Win32: The crash on update check was fixed.
     * The bug that temporary password was not cleared when authentication
       failed on SMTP AUTH.
     * Plug-in update check will be also disabled if --disable-updatecheck is
       specified on configure.
 * 3.1.0beta4 (development)
     * New features
       * SOCKS4/SOCKS5 proxy support was added (per-account option).
       * Win32: The automatic import of Windows Address Book (WAB) file on
         initial startup was added.
       * Win32: Automatic update of program and plug-ins was implemented.
     * Improvements
       * Messages on POP3 server will be left for 7 days by default.
       * New plug-in APIs for sending messages were added.
       * The option 'Always mark as read when a message is opened' was added.
         This will bring back the previous behavior.
       * Win32: The installer now allows users to choose plug-ins to be
         installed.
       * Win32: The installer now remembers the previous install settings
         on update.
     * Bugfixes
       * The bug that temporary password was not cleared when authentication
         failed with remote POP3 mailbox.
     * Other changes
       * The Japanese manual was updated.
       * NSIS installer script files are included in the distribution.
 * 3.1.0beta3 (development)
     * New features
       * Drag and drop of addresses on the address book is supported now.
       * New plug-in 'Attachment Tool Plug-in' was added. It enables the
         removal of attachments in messages.
       * MS Outlook Express mail stores (dbx) can be imported now.
       * Win32: MS Outlook Express mail stores can be imported automatically
         on first run.
     * Improvements
       * 'Alias' attribute can be selected on CSV addressbook import.
       * When modification of templates are cancelled, confirm dialog will
         be displayed now.
       * The order of templates can be changed now.
       * Virtual folders can be moved now.
       * 'Always show messages in summary when selected' was improved, and
         it is enabled by default.
         - Automatically selected messages will not be marked as read anymore.
         - The message view will not be cleared on multiple selection.
       * "mark_as_read_on_new_window" setting became a hidden option.
       * Redundant menu items are not displayed on the context menu of the
         folder view now.
       * 'Junk' special folder was added. It will be automatically created
         if not exist.
       * 'Empty junk' context menu will be displayed on the Junk folder.
       * A new account option 'Put signature before quote (not recommended)'
         was added.
       * A new option 'Change current account on folder open' was added, and
         it is enabled by default.
       * 'Cancel all' button was added to the POP3 receive dialog.
       * The POP3 receive dialog will display only the number and size of
         messages in current session, not including previously received ones.
       * On 'File - Save as...' dialog, '.eml' extension was added for the
         default file name.
       * New plug-in APIs for summary view and alert panel were added.
       * English Sylpheed FAQ was updated.
     * Bugfixes
       * The bug that accepted SSL certs were not loaded when using --configdir
         option was fixed.
       * The IMAP4 response parser was fixed.
       * The LDIF parser was modified.
 * 3.1.0beta2 (development)
     * On POP3 receiving, new messages are displayed on the summary view
       immediately. Folder switching is not required anymore.
     * The feature to combine partial messages (RFC 2046, message/partial)
       was added.
     * Users can move up/collapse/expand the folder view using left/right arrow
       key now.
     * When inline image setting is off, images are not displayed in the
       Attachment tab too.
     * When a connection to IMAP/News server fails, an error dialog will be
       displayed now.
     * The menu items 'Mark/Mark' and 'Mark/Unmark' were changed to
       'Mark/Set flag' and 'Mark/Unset flag' for understandability.
     * The upper limit of auto-check interval was changed to 1000 minutes.
     * The new plug-in APIs for user-agent string and the summary view were
       added.
     * The source files of the English FAQ and manual were added.
     * The hidden <account-id> filter condition works now.
     * Fixed-positioned windows (such as main window, compose window, etc.)
       are always displayed on screen now. This prevents windows displayed
       outside of screen between multi and single monitor switching.
     * The crash when POP3 session was cancelled while processing received mail
       was fixed.
 * 3.1.0beta1 (development)
     * Full automatic address completion was implemented. Users can also
       configure to use the previous behavior (start completion on Tab key).
     * The debug log output for filtering was added.
     * Update check can also show alternative version as well as internal
       version now.
     * New plug-in APIs for update check and folder view were added.
     * A new option '--instance-id <ID>' was added. This allows users to run
       multiple instances of Sylpheed.
     * 'Open' menu was added to the attach context menu of the message
       composition window. This allows users to open attached files before
       sending.
     * English Sylpheed FAQ was updated.
     * Plug-ins are also loaded from user plug-in directory now.
     * Unix: the default web browser command was changed to xdg-open, and
       obsolete commands were removed.
     * Unix: the crash when using %f on IMAP messages at the action tool was
       fixed.
     * The crash when clicking tray icon menu 'Get from current account' when
       no account exist was fixed.
     * The crash on 64-bit architecture with LDAP was fixed (debian BTS #463366).
     * Some GTK+ warnings were removed.
     * Redundant debug or error messages were removed.
     * The bug that MIME flags were not set to imported mbox file and filtered
       sent messages was fixed.
 * 3.0.2 (stable)
     * The random scrolling problem on selecting folders with GTK+ 2.12 or
       later was fixed.
     * The problem that config files are not updated after creating new
       accounts was fixed.
     * The problem that folder config file was not updated after changing IMAP
       or News account name was fixed.
     * Win32: OpenSSL was updated to 0.9.8n (security fix).
 * 3.0.1 (stable)
     * Several typos in dialogs were fixed.
     * The Japanese manual was updated.
     * Win32: included libpng library was updated to 1.2.43 (security fix).
     * Win32: included libtiff library was updated to 3.9.2 (security fix).
 * 3.0.0 (stable)
     * The message catalogs were updated.
     * The bug that caused freeze when sending or receiving messages with
       STARTTLS and 'SSL certificate verify failed' dialog popped up.
 * 3.0.0rc (development)
     * The Japanese manual was updated.
     * The 'Enable address auto-completion' setting was added.
     * Curl command timeout was set to 10 seconds.
     * The compile error with OpenSSL disabled was fixed.
     * Win32: multiple reference to a folder with different letter case is
       prohibited when creating a new one.
     * Some minor bugs were fixed.
 * 3.0.0beta8 (development)
     * The new filter match type 'is in addressbook' was added. This can be
       used from filtering, query search and quick search.
     * The new account setup dialog was implemented. It also supports easy
       Gmail setup.
     * The address completion was modified.
     * The spell-checking and PGP settings are preserved for draft messages now.
     * The crash problem when trying to check PGP signatures while GnuPG was
       not available was fixed.
 * 3.0.0beta7 (development)
     * The feature to add new recipients to address book on sending was added.
     * Color labels are saved on IMAP server now (partially compatible with
       Thunderbird).
     * The auto-wrapping setting is preserved for draft messages now.
     * The problem that beep sound was out when opening folders which were
       sorted in descending order was fixed.
     * The new plug-in APIs for compose window were added.
 * 3.0.0beta6 (development)
     * The bug that IMAP caches get wrongly deleted was fixed.
     * The copyright year was updated.
 * 3.0.0beta5 (development)
     * The feature to customize the color label text was added.
     * The option to set only mail address of recipients when replying was
       added.
     * When messages are added to IMAP folders, received-date information
       is also set using Date header (mainly for Gmail).
     * The configure option '--disable-updatecheck' which disables the update
       check feature was added.
     * The configure option '--enable-silent-rules' is enabled if automake is
       equal or greater than 1.11.
     * A workaround for crash caused by enchant with zemberek was added
       (requires dbus-glib-1 if enchant is equal or greater than 1.4.2).
     * The bug that caused freeze when remote IPC commands were executed.
     * The bug that IMAP caches with UIDs larger than INT_MAX were never
       deleted was fixed.
 * 3.0.0beta4 (development)
     * The folder icons were renewed.
     * 'Last 7 days' was added to the quick search options.
     * The number of matched messages is displayed at the side of quick search
       now.
     * Description is displayed on the quick search entry when it does not have
       focus.
     * Always show warning dialog when SSL certificate is expired.
     * The menu item to request disposition notification was added to the
       compose window.
     * The setup dialog on the first run became user-friendly.
     * The update check dialog will not be displayed if modal dialog exists
       or receiving of mail is active to prevent dialogs becoming
       uncontrollable.
     * The button order of folder selection dialog was modified.
     * Win32: the button order of close confirmation dialog of compose window
       was modified.
 * 3.0.0beta3 (development)
     * SHA1/MD5 fingerprint and validity period of certificate is now
       displayed when verification of server SSL certificate failed.
     * Address book is now sortable by each column.
     * Address book search feature was added.
     * The visibility of message number columns in the folder view is now
       configurable for each column.
     * The error check of socket connection became more strict.
     * Win32: OpenSSL was updated to 0.9.8l.
 * 3.0.0beta2 (development)
     * Many important bugs related to multi-threading were fixed.
     * The unintended drag start on IMAP folders was fixed.
     * The libtool version was increased to prevent linking problem.
     * Several new APIs were added to the plug-in library.
     * Win32: 48x48(32bpp) icon was added.
 * 3.0.0beta1 (development)
     * Multi-threading was introduced.
       (can be disabled by --disable-threads configure option)
     * Win32: network connection runs on another thread to prevent blocking
       of the user interface.
     * Execution of external commands (such as bsfilter) on filtering will
       not block the user interface anymore.
     * The major part of IMAP protocol communication runs on another thread
       to prevent blocking of the user interface.
     * The query search is executed on another thread.
     * LibSylph is (almost) thread-safe now.
     * Summary caches are updated on the fly (on receive/move/copy/delete).
       This improves the performance of opening folders with many new messages.
     * Progress is displayed while scanning folders.
     * The user interface of address book was rewritten using the new API
       (GtkTreeView). This will reduce the glitches in the older versions.
     * Included Sylpheed FAQ (English) was updated.
     * Some bugfixes are made.
 * 2.7.1 (stable)
     * The feature to import and export .eml files was added.
     * Progress is displayed during import and export now.
     * The warning about non-exist plug-in directory was removed.
     * The comments within Content-Type header are handled now.
     * The order of signals emitted at moving messages was modified.
     * The sylpheed.spec file was fixed.
 * 2.7.0 (stable)
     * The plug-in system was implemented (still experimental. See
       PLUGIN.txt for detail).
     * LibSylph (internal version) is built as shared library now.
     * The update check feature was implemented (requires curl command).
     * fsync() will be called after writing configuration files.
     * 'Send queued messages' is shown instead of 'Mark all read'
       in the context menu of the Queue folder.
     * The default command line options of spam filters were modified.
     * Win32: hard link will be used to improve file I/O performance if
       available.
     * A crash bug on CSV import of the address book was fixed.
     * Several other bugfixes were made.
 * 2.6.0 (stable)
     * A workaround for raw-JIS filename used for attachments (specifically
       Eudora) was made.
     * Some build fixes were made.
 * 2.6.0rc (development)
     * The backups for configuration files are kept for four generations now.
     * Only new messages are counted when incorporating from local mbox.
     * In the folder selection dialog, only folders which are expanded in the
       folder view are expanded now.
     * The folders which should not be selected in the folder selection dialog
       became unselectable now.
     * The bug that the addressbook window was not refreshed when sender of
       message was added to the addressbook was fixed.
     * The compilation error in GTK+ 2.14.x was fixed.
 * 2.6.0beta2 (development)
     * The menu was added to the remote POP3 mailbox window.
     * The sorting of remote POP3 mailbox was fixed.
     * The remote POP3 mailbox button was added to the toolbar.
     * The Japanese manual was updated.
     * Warnings about --datarootdir on configure was removed.
 * 2.6.0beta1 (development)
     * The remote POP3 mailbox feature which can view/download/delete messages
       on POP3 servers directly was added.
     * Enchant (with GtkSpell 2.0.13) was supported.
     * When creating filter rule automatically, the target header field is used
       as a default filter name now.
     * The progress column was added to the progress dialog.
     * The parser of IMAP4 was fixed.
     * Unix: SIGHUP/SIGINT/SIGTERM/SIGQUIT signals are handled now.
     * Win32: system shutdown event is also handled on debug mode now.
 * 2.5.0 (stable)
     * The sylpheed.desktop file was updated.
 * 2.5.0rc2 (development)
     * A crash bug was fixed.
     * Content-Transfer-Encoding header with comments was supported.
     * UTF-8 locale strings with suffix '.utf8' were supported.
     * The 8KB restriction of template body size was removed.
 * 2.5.0rc (development)
     * The sylpheed.desktop file was fixed.
     * The compose window now remembers the maximized state.
     * The focus will not move from the text view to the summary view with
       'Next/Prev' keyboard operation now.
     * The alert dialog is displayed now when PGP signing/encryption failed.
 * 2.5.0beta3 (development)
     * Quoted lines are excluded when notifying missing attachments.
     * The option of excluded addresses/domains for recipients confirmation
       was added.
 * 2.5.0beta2 (development)
     * The feature to confirm missing attachments was added.
     * The feature to confirm recipients before sending was added.
     * To: header is also searched in Sent/Draft/Queue folders.
     * 'Edit/Quick search' menu was added.
     * Spaces in address and server entries on account preferences dialog
       are now automatically removed when applied.
     * The address completion was fixed.
     * The compilation failure with GTK+ <= 2.8 was fixed.
     * Win32: --attach option was fixed.
 * 2.5.0beta1 (development)
     * The vertical 3-paned view mode was added.
     * The feature to save SSL peer certificate was added.
     * The option 'Treat HTML only message as attachment' was added.
     * The bug that caused busy loop when initial connection was immediately
       refused was fixed.
     * The bug that the quote description dialog never appeared again after
       closing it with the close button was fixed.
     * The new/unread status display on quick search filtered mode was fixed.
     * The windres command will not be enabled on non-win32 platforms now.
 * 2.4.8 (stable)
     * The encoding method of MIME headers is now determined by outgoing
       encoding rather than the value of MB_CUR_MAX.
     * The memory leaks and warnings in LDAP search were fixed.
     * The beep on folders with one message when using GTK+ 2.12 was removed.
     * Win32: The crash that occurred when trying to display some TIFF files
       was fixed.
     * Win32: Settings are now automatically saved on the shutdown of system.
 * 2.4.7 (stable)
     * The bug that 'Set display item of summary...' button in common
       preferences always show send folder setting was fixed.
     * The all compiler warnings were removed.
     * The previous focus is kept when separation of view is changed.
     * The status label is automatically resized now when there is not enough
       width.
     * The bug that virtual folders were not sorted properly was fixed.
     * The crash when trying to use ascii-armored PGP encryption was fixed.
 * 2.4.6 (stable)
     * The 'To' column was added to the summary view.
     * In Sent, Draft, and Queue folders, the 'To' column is displayed by
       default.
     * The display column setting of send folders became independent from
       normal folders.
     * The ascii-armored PGP encryption was fixed.
     * The combined method is used now when both PGP encryption and PGP signing
       are specified.
     * The PGP passphrase dialog was disabled on filtering and query search.
     * The new message notify will be blocked when a new message is read on
       receiving.
     * 'LIST "" "*"' command is used instead of 'LIST "" "%"' to obtain folder
       list from IMAP4 server.
     * The bug that noinferior and noselect flags were ignored until rebuilding
       folder tree when a new folder was created on IMAP4 server was fixed.
     * If attached files become nonexistent on sending, error dialog will be
       displayed and the sending will abort.
 * 2.4.5 (stable)
     * The vulnerability that may be exploited by malicious POP3 server was
       fixed (SA26550).
     * The potential crash bug in address completion was fixed.
     * The signature separator '--' is not joined on line wrapping now.
     * Win32: GLib and GTK+ was updated to the latest version.
     * Win32: The focus problem when closing dialogs was fixed (GTK+).
 * 2.4.4 (stable)
     * Reply and forward marks are appended after messages are actually sent.
     * The feature to reply to attached message/rfc822 messages was added.
     * When a folder is renamed, the path of junk folder is also updated.
     * A workaround for the error which occurs with Gmail SMTP server was made.
     * Win32: The bug that the name entry of creating or renaming an address
       book didn't accept key input was fixed.
     * Win32: The bug that the renaming of folders didn't modify filter
       actions in some cases was fixed.
 * 2.4.3 (stable)
     * The quick search entry is cleared when Escape key is pressed on it.
     * UTF-8 with BOM is handled correctly when inserting signature.
     * A possible crash when adding address from address book was fixed.
     * Win32: Sylpheed now can be specified as a default mail program in
       Windows Vista.
     * Win32: The stall of SMTP session when sending messages via dial-up
       connection was fixed.
     * Win32: The infinite loop bug which occurred when PID of external editor
       was not obtained was fixed.
     * Win32: The bug that dialogs which popup on auto-checking becoming
       invisible if the main window was minimized was fixed.
 * 2.4.2 (stable)
     * The recursive download of remote folders were enabled.
     * SSL ports in Advanced tab of the account prefs dialog are now
       automatically set when SSL is enabled.
     * The '--open' command line option which open messages in new window was
       added.
     * The quick search condition for each folder now persists between sessions.
     * The selection now persists when the quick search condition is updated.
     * Quoted-printable or base64 encoding is now forced on PGP/MIME signing
       instead of stripping trailing spaces (except for the case of ISO-2022-JP
       encoding).
     * The quoted-pair in From header is now processed correctly when displaying
       its name.
     * The performance of 'Mark all read' on IMAP folders was improved.
     * The bug that the character '+' in address was treated as URI-escaped
       space was fixed.
     * Unix: the problem that 'Get' and 'Get all' button could not be clicked
       after receiving while mouse pointer was over the buttons was fixed.
 * 2.4.1 (stable)
     * If shift or control key is pressed on address completion, only address
       string is inserted now.
     * When completing addresses, display name is used rather than nickname.
     * Win32: The sylpheed.ini file is read on startup if exist, and
       '--ipcport' option was also added.
     * Win32: The autocheck timer is disabled while suspending to prevent
       network error on resuming.
     * Win32: OpenSSL library was replaced with self-compiled DLLs.
     * Win32: A bug that the folder path separator was not processed correctly
       when creating and renaming search folders was fixed.
 * 2.4.0 (stable)
     * Invalid APOP timestamp is rejected now (CVE-2007-1558).
     * The configuration file is written out after the toolbar is customized.
     * Win32: OpenSSL was updated to 0.9.8e.
 * 2.4.0rc (development)
     * The file copy and move were optimized.
     * The crash on the cancellation of POP3/SMTP session was fixed.
     * The crash when a person was removed and its e-mail addresses were
       referenced by a group in another folder was fixed.
     * The Japanese manual was updated.
     * Win32: If the initial loading of "MS Gothic" font failed, multi-byte
       font name is used now (workaround for JIS2004 MS Gothic font).
     * Win32: The crash when fetching messages more than 64KB from IMAP4 server
       via FreeCap (a SOCKS wrapper) was fixed.
 * 2.4.0beta8 (development)
     * In the address book, the import of CSV and Tab-separated text file was
       implemented.
     * 'Within 1 day' and 'Recent 5 days' was added to the quick search rule.
     * The toolbar style switch was added to the toolbar context menu.
     * Stop button now cancels all sessions.
     * The limitation of the nesting level of MIME structure was relaxed.
     * A margin for text was added to the composition window.
     * An error dialog is displayed if the execution of junk filter command
       fails.
     * The overwrite confirmation of the file selection dialog was improved.
     * ISO-8859-16 was supported in code conversion.
     * Several UI problems in the address book were fixed.
     * The stability of the cancellation of POP3/SMTP session was improved.
     * The bug that the displayed number of message becoming incorrect on
       folder search was fixed.
 * 2.4.0beta7 (development)
     * In-Reply-To header was supported in mailto URL.
     * Stop button was added to the main toolbar.
     * An error message is displayed now when the decryption of PGP encrypted
       messages failed.
     * Remote commands such as 'compose', 'receive' and 'send' are disabled
       when a modal dialog exists.
     * Process termination is forced after the execution of finalizer routine.
     * The behavior of 'Go to next unread' with changing folders was fixed.
     * The sylpheed.desktop file was modified.
     * Win32: A bug that the folder path separator was not processed correctly
       in some cases (fixes path information becoming incorrect on renaming
       subfolders).
 * 2.4.0beta6 (development)
     * The bug in automatic IMAP4 filtering that messages which were not
       filtered were not counted as new ones was fixed.
     * Win32: The workaroud for the redraw problem of GtkCList and GtkCTree
       in GTK+ 2.10.11 was made.
     * Win32: The stall on rebuilding folder tree which appeared since GTK+
 .10.11 was fixed.
     * Win32: Environmental variable "LANGUAGE" was disabled (fixes incorrect
       language selection on some environments).
 * 2.4.0beta5 (development)
     * Close button was added to the address book dialog, and the layout was
       improved.
     * The automatic junk mail filtering on IMAP4 was enabled.
     * Automatically filtered IMAP4 messages are also counted for new mail
       notification now.
     * The default directory of the printing dialog became the document
       directory.
     * The crash on some environments when verifying signed messages was fixed.
     * The crash on exit when the order of summary columns were modified by
       DnD was fixed.
     * The wrong handling of quotation in multi-byte strings on MIME header
       encoding was fixed.
     * Win32: The bug that the timeout on receiving and sending didn't work
       was fixed.
     * Win32: The path separator problem of folderlist.xml was fixed.
     * Win32: libcairo-2.dll, libgpg-error-0.dll, libgpgme-11.dll, GLib and
       GTK+ was updated to the latest version.
     * Win32: The redraw of windows became smoother (GTK+).
     * Win32: Win32 shell icons are now displayed on the file selection dialog
       (GTK+).
 * 2.4.0beta4 (development)
     * The address book was improved.
       - Copy and paste of persons in the address book was enabled.
       - The menu sensitivity of the address book became accurate.
       - When deleting addresses from a group, they are just removed from the
         group (not from person) now.
       - 'Lookup' button is disabled if LDAP search is not available.
     * The checking of remote folders doesn't abort with non-fatal errors now
       except for network failure.
     * The problem that the width of the folder view was not saved when the
       main window was maximized was fixed.
     * The coloring of message number columns in the folder view was enabled.
     * Win32: In Windows Vista, the problem that the selected menu items were
       not visible was fixed.
 * 2.4.0beta3 (development)
     * The toolbar customization dialog was improved.
     * 'Not junk' and 'Search' button were added to the main toolbar.
     * The 'Send' button is disabled when no queued messages exist.
     * Junk mails are filtered when incorporating from local spool even if
       'Filter on incorporation' is disabled.
     * The 'Get' button of the main toolbar was fixed.
     * Several bugs of the search dialog were fixed.
     * Win32: The sorted column of the selected row on the summary view becomes
       visible when it doesn't have focus.
     * Win32: System fonts with multi-byte font names (such as 'MS PGothic' and
       'Meiryo') can be available now.
 * 2.4.0beta2 (development)
     * The toolbar was rewritten with new API.
     * 'Prev', 'Print', 'Address', 'Prefs', and 'Account' was added to the
       main toolbar, and 'Prefs' and 'Account' was added to the compose toolbar.
     * The overflow menu for toolbar was added.
     * The width of toolbar buttons was reduced when the labels are displayed.
     * The option to place toolbar labels at the right of icons was added, and
       it became the default.
     * The bug that the window was kept being skipped from window list after it
       became visible with window shading or switching workspaces.
     * Some of the UI labels are modified.
     * Unix: Symbolic links are now also scanned when scanning MH folders.
 * 2.4.0beta1 (development)
     * The automatic filtering of new messages in INBOX folder of IMAP4 account
       was implemented.
     * The customization of the toolbars was implemented.
     * The option to toggle window on trayicon click was added.
     * Junk mails are now filtered when incorporating from local spool.
     * UTF-8 is forced for headers instead of substituting characters if the
       code conversion failed.
     * The crash of the text view when switching between MIME parts was fixed.
     * Win32: the socket buffer size was increased to improve the performance
       of network communication.
     * Win32: GTK+ and GLib was updated to the latest version.
 * 2.3.0 (stable)
     * The Japanese manual was updated.
 * 2.3.0rc (development)
     * CA certificates bundle file is now looked up in multiple location.
     * Cancelling the verification of certificates is only applied for current
       connection now.
     * The version string was changed.
     * The bug that the blank message view appeared when displaying window from
       the tray icon while the message view was hidden in separate window mode
       was fixed.
     * Win32: The common CA certificates were included in the package.
 * 2.3.0beta7 (development)
     * Page setup for printing was added.
     * The range specification of printing now works correctly.
     * The printing of MIME part now uses the new printing function.
     * The font size of printing now follows the display setting.
     * The option to input signature directly was added to the account
       preferences.
     * Signature is automatically generated when creating a new account.
     * Bcc: and Reply-To: were added to the template.
     * '/etc/ssl/certs' directory is used for SSL certificate verification if
       exist.
     * When SSL certificate cannot be verified, the confirmation dialog is now
       displayed.
     * Cursor is now placed at the top of the text (alternatively To or Subject
       entry if they are empty) when reediting messages.
     * Unix: Resolver is now reinitialized if '/etc/resolv.conf' is modified.
 * 2.3.0beta6 (development)
     * The new printing function was implemented.
       - Each page is now rendered by Cairo.
       - The native print dialog is used.
       - Page number is printed for each page.
       - The option "Use external program for printing" was added.
       - The printing of MIME part was implemented.
     * Cc: was added to the header view.
     * The option "Inherit recipients on reply to self messages" was added.
     * Pilot-link (libpisock) 0.12 was supported.
     * The window position and the layout of the 'Add Address' dialog was
       modified.
     * The default directory of the file selection dialog was changed
       (in Win32, 'My Documents' is used. In Unix, the home directory is used).
     * The UI is now updated periodically on manual filtering.
     * The new mail notification on the tray icon is reset when any message
       is read now.
     * The encoding setting of the message view in new window is enabled also
       on reply.
     * Win32: The bug that the window was sometimes not displayed at the top
       when the tray icon was clicked was fixed.
     * Win32: The issue that the progress dialog was not updated while sending
       large messages was fixed.
 * 2.3.0beta5 (development)
     * When new mails arrive, the tray icon is changed, and it will be kept
       until a new mail is read.
     * The option "Open inbox on startup" was added.
     * The option "Remeber last selected message" was added.
     * The crash when printing a message with empty subject was fixed.
     * The bug that the text in the composition window was not redrawn on the
       undo of large text was fixed.
 * 2.3.0beta4 (development)
     * POP before SMTP was implemented.
     * Win32: The e-mail menu in the start menu now works when Sylpheed is
       selected as a default mailer.
     * WIn32: The character corruption on printing when environment-dependent
       Japanese characters are used was fixed.
     * Win32: The GDI resource leaks of GtkTreeView in XP classic theme and
 which had introduced eventual application crash was fixed.
 * 2.3.0beta3 (development)
     * The vertical padding of the folder view was reduced.
     * The change between folders became faster at GTK+ 2.10.x.
     * The bug that the window was kept hidden from taskbar on popup with
       another process when the window was minimized to tray was fixed.
     * The text insertion by the action was fixed again.
     * The height of the statusbar was adjusted.
     * The padding of the folder view was reduced.
     * Win32: The selection of the labels on the header view and the alert
       dialog are now visible.
     * Win32: The application icon was modified.
     * Win32: GTK+ was updated to 2.10.6, and OpenSSL was updated to 0.9.8d.
     * Win32: The network communication failure in some environments was fixed.
 * 2.3.0beta2 (development)
     * Messages marked as read or junk mails are now excluded from the numbers
       of new messages.
     * Win32: GTK+ was updated to 2.10.4, and GLib was updated to 2.12.4.
     * Win32: The crash that occurred when Desktop folder was selected on the
       file selection dialog was fixed.
     * Win32: The bug that window position was reset when quitting Sylpheed
       while window was hidden was fixed.
     * Win32: The WSAEWOULDBLOCK state is now properly handled in socket I/O.
 * 2.3.0beta1 (development)
     * GtkStatusIcon is used for the tray icon if available.
     * When GtkStatusIcon is used, the tray icon blinks for 5 seconds when new
       mails arrive.
     * The option 'Minimize to tray icon' was added.
     * The left click on the tray icon now only brings the main window in front.
     * Win32: The tray icon was implemented.
     * Win32: The SSL connection problem was fixed.
     * Win32: The included libraries (GLib, GTK+, Pango) were updated to the
       latest version. This introduces the following improvements:
       - The performance of network communication at receiving and sending
         was improved.
       - The appearance of the UI became more native-like.
       - The scrolling speed of the summary view with cursor keys was improved.
       - The broken display of the text view when it was partially hidden was
         fixed.
       - The position of color labels menu in the search dialog is correct now.
       - The problem that GTK+ strings became untranslated after the popup of
         context menu on GtkTextView was fixed.
       - The crash that occurred on startup if a font with non-ascii name was
         specified for system font was fixed.
       - The application doesn't freeze anymore when desktop theme is changed.
 * 2.2.9 (stable)
     * The crash that occurred if the summary was sorted by invisible column
       was fixed.
     * The URI of the about dialog was updated.
     * Win32: OpenSSL was updated to 0.9.8c.
 * 2.2.8 (stable)
     * The PLAIN authentication method for IMAP4 was supported.
     * The verification of encrypted and signed messages with combined method
       was supported.
     * Oniguruma regex library can be used instead of system's regex API.
     * The LDIF import of the addressbook was improved.
     * Full PGP signature information is displayed on the main text view.
     * All trailing spaces are removed when signing with PGP/MIME instead of
       using quoted-printable to improve compatibility with other MUAs.
     * A warning is displayed before sending when Bcc is specified at PGP
       encryption.
     * The bug that possibly lost relatively small messages on receiving when
       there was no disk space was fixed.
     * The behavior of manual junk filtering was fixed.
     * UTF-8 text can be inserted correctly in the compose window.
     * The error messages of the failure of displaying message body was
       improved.
     * Some workarounds for GTK+ 2.10 were made.
     * Minor UI fixes were made.
     * Other minor bugs were fixed.
     * Win32: Regular expression was supported in filtering.
     * Win32: The version information was added to the executable file.
 * 2.2.7 (stable)
     * "Mark all read" was added to the folder context menu.
     * "Set as (not) junk mail" was added to the summary context menu.
     * The option to filter junk mails before normal filtering was added.
     * When replying to all, the original address strings are used for Cc
       instead of stripped ones.
     * Windows-1257 was added for display encoding.
     * Some menu items of the folder context menu were enabled even on receiving
       messages.
     * The bug that manual junk filtering didn't work when no filter rule exist
       was fixed.
     * Several crash bugs were fixed.
     * Win32: libgpg-error-0.dll and libgpgme-11.dll was updated.
     * Win32: The scanning of folders was optimized so that receiving or moving
       of messages become faster when folders contain large number of messages.
 * 2.2.6 (stable)
     * The 8-bit literal (literal8) in IMAP4 response was supported.
     * The missing timeout handling was added for SMTP.
     * The failure of URI security check when they have leading space was
       fixed.
 * 2.2.5 (stable)
     * The character corruption and crash bug when using Japanese half-width
       kana on sending messages was fixed.
     * The execution failure when using the accessibility module was fixed.
     * The bug that new/unread count becoming negative value was fixed.
     * The bug that bold face was disabled in the folder selection dialog
       with GLib 2.10 and Pango 1.12 was fixed.
     * The incorrect progressbar display when expired messages exist was fixed.
 * 2.2.4 (stable)
     * MIME filename encoding with RFC 2231 parameter value extension was
       supported.
     * The clear button for the quick search entry was added.
     * The bug that bold face was disabled in GtkTreeView with GLib 2.10 and
       Pango 1.12 was fixed.
     * Win32: libwimp.dll was updated.
     * Win32: The bug that subfolders were duplicated when rebuilding folder
       tree while the settings were shared between Win32 and Unix was fixed.
     * Win32: The uninstaller was modified so that it only removes files and
       folders created by the installer.
 * 2.2.3 (stable)
     * The sorting of the result of the query search was enabled.
     * The printing of messages now follows the state of 'Show all headers'.
     * Relative path is allowed for signature files.
     * The To, Cc, and Bcc button of the address book are now always enabled.
     * The window position of the address book is now preserved.
     * The toggle of the Cc entry on the composition window was enabled.
     * The appearance of the address book was modified.
     * Unix: The support of metamail command was removed, and it was replaced
       with the alternative implementation.
     * Win32: libwimp.dll was updated, and the appearance of the UI was
       improved.
     * Win32: zlib1.dll was updated.
     * Win32: The application icon was updated.
     * Win32: The unnecessary message catalog files were removed to reduce the
       archive size.
 * 2.2.2 (stable)
     * The crash bug that occurred when trying to move IMAP4 folders right
       under the root folder was fixed.
     * The crash bug that occurred after a message window was closed while the
       search dialog was still open was fixed.
     * Win32: The console window is newly created if --debug or --help option
       is specified.
     * Win32: The non-ASCII filename encoding problem on executing external
       commands was fixed.
     * Win32: The bug that the main window became not responsive when an error
       occurred on automatic receiving while the window was minimized was fixed.
     * Win32: Spanish translation was added for the installer.
     * Win32: The installer was fixed so that it selects correct language on
       environments other than Japanese.
 * 2.2.1 (stable)
     * GtkSpell is enabled on configure by default now.
     * Spanish translation of the README file was added.
     * The bug that account names with filename-unsafe characters couldn't be
       used was fixed.
     * The crash bug that occurred if non-ascii newsgroup names appeared while
       getting newsgroup list was fixed.
     * The performance problem of the quick search while the summary was sorted
       by thread date with descending order was fixed.
     * Win32: The problem that the UI didn't respond occasionally when receiving
       messages was fixed.
 * 2.2.0 (stable)
     * The move and copy of messages to queue folders and virtual folders are
       prohibited.
     * The included sylpheed.spec was modified.
 * 2.2.0rc (development)
     * The 'minimize to tray icon' feature was modified.
     * The command line options help dialog is not duplicated anymore.
     * The problem that the UI was still insensitive after the execution of
       external editor failed was fixed.
     * The nonstandard Japanese encoding 'x-sjis' was supported.
     * Win32: The locale encoding problem on some languages was fixed.
 * 2.2.0beta8 (development)
     * The help of command line options was added.
     * The Japanese manual was updated.
     * When checking IMAP4 mailboxes, the number of new messages is properly
       counted now.
     * The key event handling of the quick search entry was fixed.
     * The wrong status display of the receive dialog on BSD systems was fixed.
     * The unread flag is not reset anymore when moving or copying messages
       into a trash folder.
     * Some UI fixes were made.
     * Win32: Some UIs for unsupported functions were disabled.
     * Win32: The bug that the contents of folders with specific Japanese
       characters such as 'Hyou' (which contains 0x5c ('\') at the second byte)
       at the end of its name couldn't be seen was fixed.
 * 2.2.0beta7 (development)
     * When moving, copying, or deleting a collapsed thread, all the messages
       in the thread are processed now.
     * 'Mark thread as read' feature was implemented.
     * The keys on keypad are also recognized in the summary and message view.
     * The window size of the address book is now remembered.
     * PGP passphrase is converted into locale encoding before passing to gpg.
     * Arabic encoding support was added.
     * The premature trimming of strings on the statusbar was disabled.
     * The 'Wrap before sending' option was removed.
     * The issue that it falsely entered drag begin state after passphrase
       dialog was shown was fixed.
     * The bug that the automatic account selection on reply was disabled on
       IMAP4 folders was fixed.
     * Win32: IPv6 was supported.
     * Win32: Window is properly popup on multiple launching now.
 * 2.2.0beta6 (development)
     * The cleanup of IMAP4 message caches on exit was implemented.
     * Cache files in IMAP4 folders are now properly removed on move or delete.
     * The temporary passwords of IMAP4 accounts are now preserved until exit.
     * 'File/Insert signature' now inserts signature into current cursor
       position, and 'File/Append signature' was added for the previous
       behavior.
     * Some dialogs are now placed at the center on parent window.
     * The confirmation dialog for emptying trash is not displayed anymore if
       messages don't exist in trash folders.
     * Trash folders are excluded on recursive search.
     * Locale encoding strings can be passed to --compose and --attach command
       line option.
     * Several minor bugs were fixed.
 * 2.2.0beta5 (development)
     * The quick search was implemented.
     * The filter conditions for message status such as 'unread', 'mark',
       'color-label', and 'attachment' were added.
     * The window management of the export and import dialog was modified.
     * Several minor bugs were fixed.
 * 2.2.0beta4 (development)
     * Unix: The popup menu on the trayicon was implemented.
     * Unix: Clicking the trayicon now toggles the visibility of the main
       window.
     * Unix: The visibility of the trayicon is now configurable.
     * The context menu of the folder view on search folders was modified.
     * The bug that stopped checking of new messages if search folders exist
       in IMAP4 or News mailboxes was fixed.
     * The renaming of search folders under IMAP4 or News folders was fixed.
     * A memory leak that occurs when thread display was off was fixed.
 * 2.2.0beta3 (development)
     * The results of search folders are cached to speed up the next search.
     * The search folder property dialog was implemented.
     * The position of 'Delete' menu was changed to prevent its accidental
       selection.
     * The HTTP scheme is added to the URIs begin with 'www.'.
     * Some trailing punctuations were included as URI.
     * The bug that search folders under IMAP4 or News folders couldn't be
       removed was fixed.
 * 2.2.0beta2 (development)
     * The forwarding of messages with attachments was modified.
     * The bug that previously selected row was removed from the view instead
       of currently selected one when deleting folders from the context menu
       was fixed.
     * The bug that messages with subject that includes characters that can't
       be used for filename couldn't be attached was fixed.
     * Windows-1252 was added for display encoding.
     * After incomplete POP3 session, duplicate retrieval of messages doesn't
       happen anymore.
 * 2.2.0beta1 (development)
     * The major improvements of the search function were made.
       - The query search was implemented.
       - Search conditions can be specified with the same UI as the filter rule.
       - Subfolders can be searched.
       - The search folder (virtual folder) was implemented.
     * The maximized window state is now remembered.
     * The option "Display recipient on 'From' column if sender is yourself" now
       looks for all accounts.
     * The line-wrapping of composition now doesn't join enumerated lines.
     * The nonstandard Korean encoding 'ks_c_5601-1987' was supported.
     * The bug that the initial directory was not properly selected in the file
       selection dialog with GTK+ 2.8 was fixed.
     * Some other bugs were fixed.
 * 2.1.9 (development)
     * An option to update only INBOX on checking new messages of IMAP4
       accounts was added.
     * The custom queue folder can be specified for each account now.
     * The progress of local filtering is displayed now.
     * "Update summary" was added to the context menu of the folder view.
     * Appending of messages to an IMAP4 folder was optimized.
     * "Reply to all" now works for newsgroups post.
     * The crash when an address in an address group was modified was fixed.
     * The bug that subscribed newsgroups were removed after refreshing
       subscribe dialog was fixed.
     * The complication failure on some environments was fixed.
     * Win32: The bug that blocked the application when enterning passphrase
       for GnuPG was fixed.
 * 2.1.8 (development)
     * The common preferences dialog was reorganized.
     * The memory usage on SMTP and POP3 session was reduced drastically.
     * The last position of the composition window is remembered, and the
       windows are automatically placed so that they don't overlap.
     * Filtered sent messages are not put into Sent folder anymore.
     * When attached text files are saved, their linebreaks are normalized
       depending on platforms.
     * The occasional encoding conversion failure bug on inserting a text file
       into composition window was fixed.
 * 2.1.7 (development)
     * The spell checking feature was implemented (requires GtkSpell).
     * The drop of files is allowed on the whole composition window.
     * The insertion of text by drag and drop was disabled.
     * The PGP interface is disabled if GnuPG is not available.
     * A bug that aborted program if invalid UTF-8 text is put in the log
       window was fixed.
     * The pane between summary and message view became more visible.
     * Reply-to-list is not enabled for subscribe confirmation request etc.
     * The bug that the separator of newsgroups was broken was fixed.
     * The bug that broke the summary selection when mark, unread, and
       colorlabel flags were changed while the summary was sorted by them
       was fixed.
     * The bug that caused crash when quote colors dialog was closed by the
       window close button was fixed.
     * The bug that showed wrong value if the total size of a folder was more
       than 2GB was fixed.
     * Win32: The bug that occasionally the summary was not properly updated
       right after messages were added to a folder was fixed.
     * Win32: The problem that message strings were not translated if digit
       locale environmental variable (such as "LANG=1041") was set was fixed.
     * Win32: PGP sign and encryption was supported.
     * Win32: The window focus problem of account and filter setting dialog
       was fixed.
     * Win32: The method of detecting executables was modified.
 * 2.1.6 (development)
     * The auto-save to draft of composing messages was implemented.
     * The setting of default (fallback) encoding was added.
     * The command line option '--exit' was added.
     * The preset menu for junk mail learning commands was added, and now
       bogofilter and bsfilter are selectable.
     * The option to mark filtered junk mails as read was added.
     * The buffer overflow of LDIF import was fixed.
     * Win32: The external editor function was implemented.
     * Win32: Junk mail filtering now works.
     * Win32: The default junk mail learning commands were changed to bsfilter.
     * Win32: Some options which are useless on win32 became hidden.
     * Win32: The program icon was added.
     * Win32: Some bugfixes were made.
 * 2.1.5 (development)
     * The command line option to specify directory which stores configuration
       files (--configdir dirname) was added.
     * The output headers of printed messages now match to those of the message
       view.
     * Confirmation dialog is displayed instead of input dialog on printing.
     * When replying to ML post that has the Reply-To set, both addresses will
       be set.
     * The option to delete filtered junk mails from server was added.
     * The locale name 'zh_TW.Big5' was changed to 'zh_TW'.
     * The problem that drag and drop didn't work with GTK+ 2.8 was fixed.
     * The sample mime.types was included into the source package.
     * Win32: The remote command was implemented using TCP socket.
     * Win32: The drag and drop of files from Explorer was supported.
     * Win32: The default print command for text file is used for printing when
       the command is unspecified.
     * Win32: Several bugfixes were made.
 * 2.1.4 (development)
     * Bugfixes:
       - The IMAP4 parser was fixed so that it can handle literals in response.
       - A bug that caused crashes on receive if Date header has abnormal time
         was fixed.
       - Sylpheed will not close anymore even if the tray icon is closed.
       - Win32:
         o The problem that prevented the rename and move of folders was fixed.
 	o The problem that prevented the creation of temporary files by users
 	  who don't have the write permission of the root directory was fixed.
 	o The action of Drag'n'drop now becomes move.
     * Feature changes / enhancements:
       - The directory with multiple hierarchy can be specified when creating
         a new mailbox.
       - Error messages are now output to the log window and the log file.
       - The 'Create filter rule' menu was brought back in the context menu.
       - The display of the property of top folders was enabled.
       - Win32:
         o SSL/TLSv1 was supported.
 	o The console window was disabled.
 	o The environmental variable APPDATA is used for the location of
 	  configuration files.
 	o The default browser is used now when opening URL.
 	o The system settings will be used when opening attachments.
 	o The launch of executable files was disabled.
 	o The support of environment-dependent Japanese characters was
 	  enhanced.
 	o The duplicate launch is prohibited now.
 * 2.1.3 (development)
     * The feature to save all attachments at once was added.
     * The subscription dialog of newsgroups was reimplemented with GtkTreeView.
     * The verification of S/MIME sigunature (PKCS#7) was enabled.
     * The support of character entity references in HTML messages was improved.
     * The subject line is now displayed in the title bar of the composition
       window.
     * The vertical scrollbar of the folder view now shows or hides itself
       automatically.
     * The message number columns of the folder view can be toggled now.
     * The selected row of the summary view will be kept when the state of
       thread display is changed.
     * The selected row will be aligned to center when it reaches the edge of
       the summary view on key operation.
     * The code conversion error and line limit warning will not be displayed
       anymore when saving as draft.
     * Some code cleanups were made.
 * 2.1.2 (development)
     * The core parts were separated into a library (LibSylph), and its license
       was changed to LGPL.
     * The feature to sort the summary by thread date was implemented.
     * When executing IMAP4 operations which take long time, its progress is
       now displayed on the statusbar, and the UI is periodically updated.
     * The number of messages to be copied at a time on IMAP4 was limited to
       prevent timeout error.
     * GPG and SSL settings are now saved even if they are disabled at the
       compile time.
     * The auto detection of Japanese encoding now supports UTF-8 encoding.
     * The text display has been modified a bit.
     * The initial implementation of tray icon was added.
     * Address fields are now normalized before sending.
     * Some problems of the addressbook was fixed.
     * A bug in which message/rfc822 attachments were broken when pgp-signed
       was fixed.
     * Win32: A bug in which opened sockets were not closed properly was fixed.
 * 2.1.1 (development)
     * IMAP4 now works with Win32 platform.
     * The sorting of summary now fall backs to comparison by date.
     * localedir, manualdir, and faqdir became user-configurable on configure.
     * A bug that multiple selection of the addressbook with Control key
       didn't work with GTK+ 2.6.9 was fixed.
 * 2.1.0 (development)
     * Win32 (MinGW) platform was supported.
     * Many portability fixes were made.