Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1b2pre) Gecko/20081026 Shredder/3.0b1pre Windows is XP-X64, running on a dual-core Athlon When I am working in a POP folder and perform a certain sequence of operations, TB gets hung up in a weird way, which keeps me from being able to view any other message in that folder until I restart. Steps to reproduce: 1) Have a folder containing a variety of messages (e.g. a bugmail folder), in threaded view. Start Shredder, enter the folder. Have the message pane open. 2) Select a single message and delete it. 3) Select a message in a thread, and select the entire thread (menu or shortcut). 4) Hit the Delete key. Observe. 5) Select a different message. Observe. 6) Hit the Delete key again. Observe. Actual results: 4) Messages are not deleted 5) Message is not loaded into thread pane. 6) Message should be deleted. Expected results: 4) Messages should be deleted 5 & 6) All subsequent selected messages should be viewable and deletable. Deletion also fails via the menu. If you open a message into its own window, it is then viewable, but still not deletable. Messages can be starred & tagged. I haven't tested this yet on a 32-bit system; the behavior is somewhat similar to bug 459521, which is X64-only in my experience.

I tested this on a 32-bit XP system, and the symptoms above are not reproducible.

would like to fix this for b2, but will need to get help from someone on a 64 bit system.

I haven't seen this on vista 64 - it almost sounds like you've had some sort of gpf that hasn't been caught by talkback.

Mike, can you reproduce with current v3.1? ftp://ftp.mozilla.org/pub/thunderbird/nightly/latest-comm-1.9.2/

Yes, I can still reproduce this. Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.2.2pre) Gecko/20100307 Lanikai/3.1b2pre Bug 459521, as well, which is more important to me. As noted at that bug, this may be an issue with running on an AMD processor. I'm still running XP/64.

Mike, Are you still seeing this? I can't reproduce this in 64bit win7 with pop account.

I just tried to reproduce this with TB9.0.1 on WinXP/64, and did not see the problem.