JToolBars have a problem on Win32:

   When the drag starts and the dragWindow is popped up, the toolbar
sometimes gets a MOUSE_EXITED and so the dragging stops -- because there is
no MOUSE_RELEASED, the dragWindow stays up but the toolbar is never added to a frame. This looks really bogus. We need to find a way to deal with this,
whether by fixing the AWT or by working around the problem.