I have the same problem. It will sync at 60-71 and 75-85, but won't sync well at 72 (image is green or yellow). I use 60 as it gives me the smoothest pans on HTPC (Geforce2 based). At 70 or higher refresh, pans tend to have tearing (slight break up of top half of image lagging behind the bottom by a millisecond; especially noticeable on straight edges (bars in a jail cell for example). At 60 Hz, my desktop tend to be slightly jittery on computer text but smoooooth on video. I'm testing a Radeon system next (got a Radeon VE for $51 from the net--$62 shipped) to see if it'll sync better and have smoother desktop at 60 Hz.
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