This occurs on Solaris 10 GNOME. Double click on the JFrame title bar to hide it's body when a menu is dropped down and visible. When it is restored to normal by double clicking again, JFrame is not repainted properly.

Steps to reproduce:
1. Run the attached code.
2. Drop down the menu. Leave it dropped down.
3. Double click on the title bar. Now the frame body gets hidden and only the title bar is visible.
4. Double click on the title bar so that JFrame is restored to its normal state.
5. It can be seen that the menu bar is not repainted properly and the JFrame is empty.
6. Resize the JFrame and the contents re-appear.

This behavior can be seen occuring from b32 onwards.