Tested with Jan7 optimized build with 10Mb partition: - launch the app - type cmd-9 to go to test9 - type cmd-5 ==> crash I didn't check for sure but it seemed to me that the crash was dure to leaving test9 more than going to test5.

Note: there is another crash with test9 (#2236) although the two don't seem to be related.

Reassigned to beard because he already has 2236.

As far as I can tell, we are crashing because when a nsWindow is deleted, it doesn't set the nsToolkit::mFocusedWidget to nil if it is the focused widget. Then when the focus is set to another window, we crash and burn by sending the deleted window a losing focus event. I don't know if the problem is that a window should have lost focus before being deleted or that upon being deleted a window should lose focus.

forgot to reassign the bug

fix checked in

Verified fixed in 2.2.99 Mac OS build (with 10 MB RAM partition.)