Disabling the Aero theme style for Windows 7 solves most display issues where the focus windows get lost.  It has to do with how Aero's transparencies or sticky "fit to" windows work or some such... Here's a "how to" if needed:

http://www.howtogeek.com/howto/windows-vista/disable-aero-on-windows-vista

(Win 7 instructions included)