User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8) Gecko/20051111 Firefox/1.5 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8) Gecko/20051111 Firefox/1.5 I have marked this "letter" (which has nothing in it) as junk, then deleted all mail marked as junk from the folder, gone to trash folder and emptied trash and when I go back to Junk folder the same letter is back again. Instantly. Has been happening for several months. Beginning to worry that it might be some form of tracker but all virus, adware etc... software I have doesn't recognize it. Not sure if it is reproducable for you. I have it every day. Without fail. I have checked with internet access off and letter still comes back. Reproducible: Always Steps to Reproduce: 1.Open junk mail folder 2.delete all mail in folder. 3.Exit folder then go back into folder. Actual Results: One piece of mail (empty with 12/31/1969 date) will still be in folder Expected Results: I would expect that the letter would disappear and not come back. I'm not positive if it is the software. I couldn't find any "bugs" that matched this description but I figured you folks would be first place to start. Please e-mail me with questions. I will help in any way.

Have you tried deleting the content of the Junk folder? You'll find it in your profile dir (see http://kb.mozillazine.org/Profile_folder). Open up a file named "Junk" (no ext) with a text editor and make the file blank. You could also attach that file here so we can check why thunderbird couldn't delete it.

Duplicate of bug 209501? See bug 209501 comment 62 for a possible workaround.

Agreed, it's probably a dupe; I don't think that comment specifies a workaround, however. The real workaround is to close TB, find and delete Junk.msf, and restart the program. Craig Kindy, if that works for you, please mark this bug as a dupe of that one.

Thanks to all who sent suggestions. I deleted all mail in junk folder along with questionable letter then before closing folder to empty trash I deleted the folder. Problem letter has not come back in over a week now. Recreated Junk folder after using TB for 1 day without it. No problems yet

*** This bug has been marked as a duplicate of 209501 ***