User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.9) Gecko/20100824 Firefox/3.6.9 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.12) Gecko/20101027 Lightning/1.0b2 Thunderbird/3.1.6 Every so often, Thunderbird will report "4294967295 messages downloaded" in the status bar. 2 ^ 32 - 1 = 4294967295 (or the integer representation of -1). Doesn't seem to happen except Reproducible: Sometimes Steps to Reproduce: 1. Start Thunderbird. 2. Be observant. Actual Results: Not really sure what the actual results should be... Expected Results: ...But I do know that "4294967295 messages downloaded" is wrong. It seems to be related to checking e-mail every 'x' minutes. It might also have to do with having multiple e-mail accounts set up with the same Thunderbird installation.

"Doesn't seem to happen except "...oops. Didn't finish my sentence. Doesn't seem to happen except during checking of e-mail every 'x' minutes. I've never seen it happen on the initial download of e-mail on startup. Which will obviously make testing a fix a pain in the neck.