I have a multithreaded java application that throws eventdispatch
nullpointer exception if someone clicks repeatedly with their mouse on
a box that is listening for mouse pressed events. The application
either crashes or just disappears from the desktop, it happens only on
Dell X60 computers running win2k, I am using only java.awt, I have
read about threads created by me trying to update a GUI which can
cause the dispatcheventthread to misbehave, and that all gui related
stuff should be deferred to dispatch event thread using invokelater, I
did this but this does not seem to have fixed the problem.
Any pointers will be appreciated ?

Dear brother,

You told that your program throws eventdispatch
nullpointer exception if someone clicks repeatedly with their mouse 

Null pointer exception is thrown whenver you create an object and if
it does not used properly in your programm ur.  You better make the
threads synchronized so that it will restrict the user to perform
overactions

still unsatisfied ... go to java.sun.com

I have made the threads synchronized and it still does not work, properly

Hi,
Can you please paste the method mousePressed and the exception.