User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:2.0b11) Gecko/20110211 Firefox/4.0b11 Build Identifier: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:126.96.36.199) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Thunderbird/3.1.7 When I press 'a' to archive a message and then undo it, the message reappears as expected. But the undo apparently doesn't delete the message from the Archives folder. Reproducible: Always Steps to Reproduce: 1. Select message, press 'a' 2. CTRL+Z or Undo via menu 3. Check that message is still in Archives folder
Actually, maybe it's something with the 'move' operation. Today I noticed that a duplicate appeared after I had deleted attachments from a mail (to reduce storage needs in the Sent folder): I got one with and one without the attachment. But I'm not absolutely sure if it's reproducible and don't have time to test it properly right now. But maybe there is something about it in which case it might lead in the right direction.