Description of Problem: When I use kmail to access an SSL'd IMAP connection, where the IMAP server has a self-signed certificate, kmail pops up a warning about the certificate, which is fine. It then asks if I want to accept the certificate forever, or just for current sessions. If I choose "forever", it will work until I log out of KDE. The next time I start KDE, and use kmail, it will prompt me about the certificate again. So it appears that it's not saving my acceptance of the SSL certificate permanently.
Are you still seeing this in beta3?
This bug seems to have gone away in later betas.