I'm running Windows 7 Home Premium on an iMac 24" (early 2008) using BootCamp.
Sometimes when I try and play a video in full screen I get jerky playback, although never when watching YouTube videos oddly enough.
I'm currently using Chrome as my browser of choice.
As a fairly new convert (back) to Windows is this is a known issue with Windows 7, flash, the browser or something to do with BootCamp?