User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:2.0b7pre) Gecko/20101008 Firefox/4.0b7pre SeaMonkey/2.1b1 Build Identifier: Mozilla/5.0 (X11; Linux x86_64; rv:2.0b7pre) Gecko/20101008 Firefox/4.0b7pre SeaMonkey/2.1b1 Renaming a mail folder leads to confusing results which may result in data loss. The folder is renamed, but the corresponding msf file seems to be shown as new folder, which of course is empty. It needs a restart to set this right. Reproducible: Always Steps to Reproduce: 1.create a mail folder with some mails 2.rename it 3. Actual Results: Folder seems to be empty - possible dataloss when wrong consequences are taken. Expected Results: Folder should have original content with new name

confirmed with "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b8pre) Gecko/20101022 Thunderbird/3.3a1pre"

I think this might actually be a dupe of bug 588006 in the end...

I can confirm this bug on Windows Vista Home Edition SP3 too. Here what I've discovered about its behavior: renaming folders duplicates message files inside user's profile folder. Example: try to rename the same folder four times. In your profile folder there will be: test1 test2 test3 test4 message files but one test4.msf (with data) and a test4.msf.msf (empty, 0 byte). Deleting the *.msf.msf files seems making the messages appear in SM. However this workaround is not confirmed from other users that have tested it.