Seamonkey 99040717 on linux Hardware: System OS: linux 1. Launch apprunner 2. Open Messenger via Task menu 3. Notice there is a new area to the right of Thread pane, it's blank. 4. Notice the separator bar between Sidebar (folder)pane and Thread pane is missing, can't resize panes correctly. If I try to resize by dragging the left side of the message pane to the left, strange things start happening...mousing over the panes cause resizing just by mouse movement, unpredictable results.

Also happens on build Apr8 (1999040808) Changing Priority to P1, can't really test mail with this. Possibly related to win32 bug 4759

Per mscott, duplicate of http://bugzilla.mozilla.org/show_bug.cgi?id=4759 *** This bug has been marked as a duplicate of 4759 ***