Triple head system (a 2009 mac pro octo w/2 of the gt120 cards). I put in a DVD and the dvd app starts automatically. So far so good. Then I drag the movie window into another, empty screen. So far so good. Then I make the movie window full-screen. So far so good. Then I move my mouse back into a DIFFERENT screen and type something into the terminal APP. At this point the dvd window reverts OUT of full screen. Even though I am not in that window, or interacting with that window in any way. This is wrong. How do I make this incorrect behavior stop happening ? Selecting the dvd apps "Viewer above other apps" does not change this incorrect, counter-intuitive, user-unfriendly behavior. Thanks.