Took my Mac Air because it was shutting down one core processor everytime I used video chatting with Skype or when I watched movies online..Video Streaming. Anyway, incially the Genius couldn't replicate the problem i Sent me home. The second time I call 800-My-apple...same problem, 3rd time I recorded the episode....I gues it was enough for a Genius to take in my notebook and replace the logics board and the fan assembly. More news to come, but what I read, this is a common problem with the video card, so if you don't use much video, it will not affect you, but if you use it to watch or chat, then this is causing the problem. Any feedback? BTW- this notebook is 4 months old and they did offered me a MBP.