[Dovecot] Imap sent folder sometimes dosen't get updated in dovecot-1.1-rc3(+some current hg patches)

Yes, again, some sent emails don't get copied to sent folder.

This time I get the following error: Error: IMAP(username): UIDs broken with partial sync in mbox file /maildir/username/Sent

This happened at least with thunderbird and with evolution.

Dovecot is running on vith fcntl locking on Centos5, sendmail should use fcntl, too. Filesystem is ext3 on drbd partition.

After a grep vith dovecot.log I see the same error message also with other imap folders as well (mainly Trash imap folder).

Should I try to get a rawlog?

Regards, Diego.