On my win2k laptop (Toshiba Satellite 2085-s402 with an nVidia GeForce2 Go
chip), running another app in fullscreen mode causes a Swing app to lose
icon contents (that never get restored).

To duplicate:
- Run Notepad
- Move another window over all of the icon images to force them to all get
repainted at least once (this ensures that we are now using the vram-cached
version of the icons)
- Go to a DOS box and hit alt-enter (forcing it into fullscreen mode)
- Hit alt-enter again (bringing DOS out of fullscreen mode)
- Note that all or the Notepad icons are now black or garbled.

Note: Due to bug 4731131, the app will probably just crash when you return out
of fullscreen mode. I am working with a build that has a workaround in
the code for this bug, so I can see the effect of the icon content loss
where I would otherwise just see a crash.