I have Quicktime Pro, and recently installed quicktime 5 preview 2 on my comp. I have a G4 400 AGP w/ 352 megs of ram and I'm running the ATi rage pro card that came with my comp. Ever since I installed qt 5, when I try to view full screen with any movie in any format, quicktime crashes. Does anyone else encounter this problem? I tried uninstalling qt5 and put qt4 back on as a clean install and the problem remains. Please help.