Hi Jonathan,
I'm getting tired of Thunderbird telling me I have unread messages in folders that haven't gotten new messages for months so I'm looking for a new mail client. [..]
Yes, it's a Thunderbird issue only. Usually that appears when you don't compact your folders (you can ask TB to compact by itself as well). 90% of the time when you have weird stuff in your folders that's because you didn't compact your folders. http://kb.mozillazine.org/Duplicate_messages_received http://kb.mozillazine.org/Thunderbird_:_Tips_:_Compacting_Folders Cheers, Thomas