STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. on solaris, open the following url with java console open:
http://sqeweb.sfbay.sun.com/jsn/users/fred/master_run/deployment/src/plugin/CustomProgressBar/CustomProgressBar/html/mulitextension/MultiAppletMultiPleExtTest.html

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No exception is thrown
ACTUAL -
The following exception is printed:
java.lang.NullPointerException
at sun.plugin.util.AnimationPanel2.doPaint(Unknown Source)
at sun.plugin.util.AnimationPanel2.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)


REPRODUCIBILITY :
This bug can be reproduced sometimes. If it can not be produced try to clear cache and re-open the applet.