Apple has acknowledged it has problems with the video software used in the latest shipment of MacBooks and MacBook Pros.
Early customers of the Penryn refresh of the Apple notebooks had complained of flickering images during a QuickTime video playback on MacBooks and MacBook Pros shipping with the latest version of Mac OS X Leopard, according to our colleagues over at MacFixIt.
Several discussion threads have sprung up over on Apple's user forums, and some customers report that Apple has now acknowledged the problem and is working on a fix.
MacFixIt reports that fix should come with Mac OS X 10.5.3, currently in the works. AppleInsider has reported that Apple has been a little more active than usual with the release of new builds of 10.5.3 to developers, suggesting that the next version might arrive sooner rather than later. Mac OS X 10.5.2 was shipped in February.
Many people are reporting that coverflow in iTunes and Finder etc is causing a total system freeze requiring a fored power down in order to recover control of their systems.
I am having this problem, and I can say that my old XP laptop is starting to look good right now :)
Anyway, I have also read of Apple's support forums that iTunes users on Vista are having coverflow "crash" their video drivers to crash: http://discussions.apple.com/thread.jspa?threadID=1479563&tstart=0
So I think the graphics issue is much broader than this article would suggest