I have added a popup menu to the choice in which i have added a menu separator as the last item. But the menu separator is not rendered. It happens only in nimbus L & F. It is seen in all other L & F. I checked it in solaris developer express in GTK Nimbus Theme , the menu separator is seen. I have attached the screen shot of all L & F.

Step to reproduce:-
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1) Run the attached testcase.
2) Right click on choice. You will see the popup menu. If you dn't see the menu separator as the last element in the popup menu. then the bug is reproduced.