Sylpheed

Hi, when reading mail in the preview window, the current open message gets marked as read upon automatic checking for new mail. This is a problem if I have only unread messages displayed, resulting in losing track of the message.

How to reproduce:

1. Set automatic checking for mail
2. Open a mail folder, set displayed messages to 'Unread'
3. Open a message in a preview window
4. Wait for automatic check of mail to happen

What happens:

- Current message gets marked as read, the next unread message is displayed in the preview window.

What should happen:

- Current message stays unread unless truly read, remains in the preview window.