From Bugzilla Helper: User-Agent: Mozilla/4.77 [en] (X11; U; Linux 2.2.18 i686) BuildID: all The imap client can't handle the situation where another imap client (accessing the same folder on server) deletes messages. It basically gets into the 'message set invalid' error state. Reproducible: Always Steps to Reproduce: 1. Set up imap 2. Access folder on server 3. Delete message in that folder from other client 4. wait till folder gets scanned again in bg Actual Results: Error condition, repeats constantly once it occurs. Only way to stop is to exit and restart mozilla. Expected Results: If message set invalid error occurs, mozilla should recalculate message set or re-retrieve folder contents running against MSExchange-5.5, other client is Outlook using MAPI. Since I browse and do some mail with mozilla, and most mail with outlook, it is pretty critical, since once I send a piece of mail with mozilla, if I change the folder on outlook, I have to quit out of mozilla and restart it. (In my case, usually occurs with Sent Items.)
I believe this may be equivalent to 40701, but that bug appears idle w/ no changes since January. The bug most definitely still exists.
*** This bug has been marked as a duplicate of 40701 ***