So I finally received my 13" 1.86 with 4gb ram yday. Everything is great when I turn it on. Apps load up super fast. Then I try playing youtube, hulu, and netflix. This thing cant handle HD!! The fans turn on to 6400+ rpm the entire clip/movie. They're on full blast and I cant even hear the clip. If that wasnt bad enough, the stutter is insanely annoying. I wait for it to buffer yet it still keeps lagging. Forget 1080p, I cant even watch 720p. The CPU usage is at 85%. For a lousy youtube clip!! 85%!! My biggest regret is that I got it from macmall and can't return it. My biggest fear came true. My 3 yr old MBP was a fully capable machine and I downgraded into something so outdated that I cant even play videos on it. Any suggestions on how to make this thing bearable? All you guys claiming to be able to watch HD, how do you do it?