Hi Timo,
I had just tested rc5 today and it didn't work for me. So I just downloaded rc6 and same problem. Here's what I'm seeing in the log.
dovecot: May 29 19:10:10 Error: IMAP(support@junkemailfilter.com): mail_location: maildir: Unknown setting: dovecot: May 29 19:10:10 Fatal: IMAP(support@junkemailfilter.com): Namespace initialization failed dovecot: May 29 19:10:10 Error: IMAP(marc@perkel.com): mail_location: maildir: Unknown setting: dovecot: May 29 19:10:10 Fatal: IMAP(marc@perkel.com): Namespace initialization failed dovecot: May 29 19:10:10 Info: imap-login: Login: user=marc@perkel.com, method=PLAIN, rip=24.143.247.50, lip=65.49.42.45, TLS dovecot: May 29 19:10:10 Error: IMAP(support@junkemailfilter.com): mail_location: maildir: Unknown setting: dovecot: May 29 19:10:10 Fatal: IMAP(support@junkemailfilter.com): Namespace initialization failed
mail_location = maildir:/vhome/%d/home/%n::INDEX=/nobackup/imap-cache/%d-%n
If this isn't a compatible setting then it should be documented here.
http://wiki.dovecot.org/Upgrading/1.1
I was going to give the passwd-file authentication a test s that I know that it works with my weird configuration.