HERE'S HOW TO FIX; NVIDIA and DVI at 1600x1200 = Jitter when playing encoded video,

[pinktank]

well, ati users open control panel and click REDUCE DVI FREQUENCY

here's what we do;
go to properties form your desktop
settings
advanced
geforce ****
screen resolutions & refresh rates
advanced timing
and from timing standard, 2 sn deopdown menu from top, choose:
coordinated video timing reduced blanking(CVT-RB)