I've been using the 1.0 test series (currently 1.0test 67 and before that 1.0-test59) and both exhibited this issue.. I use Thunderbird and will open one or two of my nested Maildir folders via imap and find that it goes out there trying to open the folder (according to the messages that Thunderbird claims) and it never comes back.. I've attached to the various dovecot processes to see what their doing and they appear to be waiting for things to do -- e.g. not working on anything in particular.. The only way to fix this is to quit Thunderbird and restart it.. I see this about 2-3 times a day.. I'd love to track it down.. I've seen this on Fedora Core 1 (i386 server) and also on a PPC Linux system running an older kernel (on a Buffalo Linkstation if you know what that is)..
Below is the current set of dovecot processes running on my FC1 box :
[rickf@srv1 dovecot-1.0-test67]# ps aux | grep dove root 748 0.0 0.0 3380 720 ? S 11:30 0:00 dovecot-auth dovecot 749 0.0 0.0 2440 668 ? S 11:30 0:01 imap-login dovecot 760 0.0 0.0 2788 700 ? S 11:30 0:01 imap-login root 709 0.0 0.0 2312 688 ? S 11:30 0:13 /usr/dovecot/sbin/dovecot
I'd be happy to track this down if someone can point me in the right direction..
-- Rick