Screen Tearing / no Vertical Sync problem on 9400M powered Mac

Does anyone have a fix for the ugly screen tearing issue that happens on the nvidia 9400M powered Macs?
If you don't see it or know what i'm talking about, open up Safari or Firefox, go to slashdot.org for example and scroll slowly up and down the page. You will see horizontal lines "tearing" and an almost jerky display (on Macs with 9400M cards only). This problem plagued windows XP and is a huge reason I prefer Mac's.
Please Apple fix this, or offer an explanation. Anyone else want this fixed or know of a way to force vsync or triple buffering?

Hi, we have the same radeon card as you and am also suffering from the tearing issue. Did you ever manage to resolve the problem?
Cheers

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