Must be pierre: Much of our non-static/global data needs to be partitioned by window, not reachable by other windows except through statics/globals. Therefore we're starting the hunt with statics and globals. Please have a look at the file(s) below to see if we can improve reentrantcy across the code base by making modifications to: widget/src/mac/nsAppShell.h: static PRBool mInitializedToolbox; widget/src/mac/nsMacMessagePump.h: static nsWindowlessMenuEventHandler gWindowlessMenuEventHandler; widget/src/mac/nsMenu.h: static PRInt16 mMacMenuIDCount; widget/src/mac/nsScrollbar.h: static ControlActionUPP sControlActionProc; // we only need one of these widget/src/mac/nsToolkit.h: static nsWindow* mFocusedWidget; widget/src/mac/nsToolkit.h: static PLEventQueue* sPLEventQueue;

These data can't be partitioned by window: we need only one copy per application. All are private/protected: just one wasn't, it's fixed now.

thanks

pierre -- is this a code level fault? If so, did you did a self test or some other test to verify fix?

The bug was opened at the same time as dozens of other ones asking programmers to check for static objects in their modules. We can't do much more, except verify that the modified code (if any) does work. On my part, I just changed a public variable to private and this has no impact on the program execution. Marked Verified.