User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12 Build Identifier: version 2.0.0.9 (20071031) I tend to go through my mail using the key commands "N" and "J". For a long string of junk mail, the key sequences will be N J N J N J N J N J N J Periodically (every 15 messages or so), when I press "J", the currently selected message is marked as junk briefly, then all the messages I just marked as junk (including the currently select message) are suddenly marked a non junk. It looks a bit like some race condition is involved, where Thunderbird is downloading the contents of a message at the same time I mark it as junk (I can tell it's junk by the subject + sender). I'm connecting to an IMAP server, and it only seems to happen when the server is a bit slow in responding (especially if the message is large), or if I press "N" then "J" very quickly. I cannot reproduce it by marking old messages an unread and going trough them again, possibly because Thunderbird is hitting a cache instead of downloading contents from the server. Reproducible: Sometimes Steps to Reproduce: 1. Mark many messages as junk by pressing N and J repeatedly 2. Press N and then J immediately (especially on a large message) 3. Observe that the messages you marked as junk are not not. Actual Results: All the mail I had marked as junk is not marked as non-junk Expected Results: The messages marked as junk should stay marked as junk - regular theme - messages are not set to move to junk folder or be deleted when marked as junk - using the following add-ons: - Confirm folder move 1.0 - Enigmail 0.95.6 - Nostalgy 0.2.15 - Quickfile 0.17.0.0011 - Quickfolders 0.4 - Talkback 2.0.0.9

This may be the same issue as bug 424876. If that were the case, then what you are seeing is the message marked as unknown (that is, losing its status), rather than marked as "not junk".

Michael are this issue still here on TB 3.x?

I haven't seen this on 3.x. (Though I'm having so many other problems with 3.x that I may downgrade to 2.x, but I guess that's another bug..)

According to comment #3 and comment #1, this bug is close as WFM on current Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.2pre) Gecko/20100208 Lightning/1.0b2pre Lanikai/3.1b1pre ID:20100208031905