I can't watch the trailer at all, due to its choppyness, like one frame every 5 seconds. I checked out CPU usage at the same time and there was still some idle CPU there, so it is not that I am maxing my system, and have plenty of free ram according to Topmonitor. What is going on? My system is as follows G4 500 768mb ram OSX 10.2.4 Programs running are konfabulator, VNC, iChat, Safari, and Quicktime (whatever the newest version is) DVDs work just fine, even a DVD Video_TS folder i Ripped with DVD Backup. I have also tried it on different hard drives, but not yet on the system drive. I have tried it with nothing else running. What is wrong with my system?