As a JFrame/JDialog is moved around over another JFrame on Windows NT,
parts of the frame/dialog are left in their old locations on the screen.
To recreate these refresh problems, execute the JCK Swing interactive
tests for JFrame and JDialog on Windows NT.
Moving the frame/dialog under test over the test frame should recreate
the problem.

The tests that need to be executed for bug recreation are:
api/javax_swing/interactive/JFrameTests.html#JFrame
api/javax_swing/interactive/JDialogTests.html#JDialog