Java Icon in TaskBar resizes randomly when MultiLevel SubMenus, Nested menus are dropped down.

This is observed on systems with Linux OS only.
1)Compile the attached test and execute with pit build for jdk7.0 build 07.
2) Resize the frame to a small size and
3)place it in the right corner of the screen. (The bug is more prominent with these steps)
4)No Click on BuggyMenu2/Buggmenu3 and then click on the sub menus. Make sure that the drop down and the submenus span outside the frame.
5)Keep moving the mouse up and down in the dropdown, submenus/nested menus.
Observe the taskbar while doing this.
The Java icon seems to "toggle" to a different size every time you entere or exit the sub menus.
I tried this in JDS Cinnabar, SuSe10. I could reproduce this on RHEL AS release 4.