gpgme on 64bit windows fails to find gpg
This is really a bug in gpgme but a quick search did not turn up a bug reporting place for them; kindly forward upstream.
Sylpheed fails to find gpg.exe on 64bit windows 7 apparently because gpgme looks in the wrong place (Under "Program Files" instead of "Program Files (x86)". gpgme also does not provide an override mechanism as according to an old mailing list message such a thing "does not make sense". The end result is that gpg functions are unavailable in sylpheed despite both appear to be correctly installed, in fact are simple stock installations of the gpg4win and sylpheed distributions respectively. Apparently dysfunction makes more sense than function to the upstream. Tested with 3.1.? and verified still a problem with 3.2.