I happen to try Windows PowerShell ISE (
http://technet.microsoft.com/en-us/l.../dd315244.aspx ). Turns out, it also uses Windows Presentation Foundation (WPF). When I started it, while my two DisplayLink monitors were running, got monitors flashing in a manner similar to what happened when I ran rev 6.7 of X1. With my two DisplayLink monitors disconnected, Windows PowerShell ISE comes up fine.
AGR