Separately, owners of both the new unibody MacBooks and MacBook Pros are reporting
wave-like video distortions while scrolling in web browsers of viewing HD content. They say the problem is common on most systems on display at Apple retail stores, but note the distortions do not appear while running Windows, which may suggest a Mac-specific NVIDIA driver issue.
Adding to that theory, other users note the problem also exists on NVIDIA-based iMacs, but does not show up on the MacBook Air with integrated Intel graphics or iMacs with ATI graphics cards. Another theory is that a combination of the NVIDIA graphics card drivers and Apple's Webkit rendering engine is to blame, which would explain why the distortions do not appear under Windows or Mac browsers that do not rely on WebKit, such as Opera.
Again, Apple is said to be aware of the issue, but in this case is already working on a software fix, according to Apple Support forum member
rnicolson:
After discovering this problem on the MacBook Pro I purchased a few weeks ago, I visited the Apple Store in Regent Street to check whether the problem was common to all the new MacBook Pro's. I checked five MacBook Pro's they had on display and they all had exactly the same wave distortion on the screen, when scrolling in Safari using the side bar. There was no distortion when the up/down keys were used. I showed this screen distortion to an Apple salesperson, who seemed genuinely surprised. He disappeared to the back office in the store for a discussion with a 'senior Apple Engineer' and after five minutes he returned with the statement that this was a known problem and there will be a software fix for it sometime...
