Several users have noticed a significant performance issue while using Apple's Front Row after upgrading to Mac OS X 10.6 Snow Leopard.
Affected systems exhibit jerky video playback and overall slow and buggy performance. Most users in this Apple Support Discussions thread are reporting the issue on Mac Minis and older generation MacBooks with shared graphics processors. ASD user "Watchful" reports:
So I just installed Snow Leopard on my Mac Mini which I use as a media center in my living room. So obviously I use Front Row extensively. Imagine my dismay to find out that front row is now jerky, sometimes won't respond, and in general *****. Videos play back jerky, and steppy as well while the same videos play find through Quicktime X or Quicktime 7, and iTunes full screen.
Several suggestions have been made throughout the growing thread, though none have seemed to create a solution. The Unofficial Apple Weblog (TUAW) has written this article about the Front Row issues. The best guess TUAW, the forums, and I could make would be an underlying issue with the way Front Row is accessing the QuickTime X resources.
Be sure to stay tuned to MacFixIt as more on this issue unfolds. If you have experienced this issue, or found a workaround for it, let us know in the comments!