In converting everyone at our site from UW-IMAP I've run into another problem with Thunderbird users that I'm hoping someone can help me with.
The dovecot version I'm running is old (1.0.13 - we don't do production upgrades that often but I'm perfectly willing to install a newer version). The affected Thunderbird users are running Thunderbird version 2.0023 under Windows. All mail is stored in mbox format.
What appears to be happening is that searches looking for string matches in the message body don't work. I set up a test case with the affected user. We created a folder that had 6 messages: 5 containing the string in the message body and 1 that did not. Then we set up a search folder that looked for the string. Opening the Thunderbird search folder yielded no messages matching the search. A rawlog trace of the search in dovecot showed that dovecot had indeed responded that no messages were found (when 5 should have been).
This doesn't happen with UW-IMAP (version imap-2007e which I think is the last version with bug fixes ever issued). Is this perhaps a known bug in dovecot that was fixed many releases ago and I should upgrade?