I recently got a new uMBP 15" 2.66, and have found that, every once in a while, the computer hangs for up to 5 seconds intermittently. I have been watching episodes of TV shows in iTunes that last about 50 minutes each. I cannot even make it through an entire show without the 5 second hang. This is irritating, because when the computer comes back to speed, the TV show is five minutes ahead and I have to rewind. It also happens whenever I start a session in firefox, where it has to load 15-20 or so tabs at one time (I have a session saver.) I'm not sure what's going on here. The late '07 2.4ghz 15" that this machine is replacing never even stuttered, even while doing the exact same tasks I am currently having problems with. My instinct leads me to start thinking that it might be some type of imminent hardware failure. I've heard of people having these symptoms shortly before a logic board dies or HDD crashes. What are your opinions? I'd really hate to have to send this in for repairs so very soon, having only owned it for a few days... but might the circumstances merit it? I also seem to have a loose hinge... Perhaps I should just try to get it replaced? Thanks, Relznuk **Update: This now happens periodically at random intervals in any application I am using, no matter if I have one app open or many. Further more, it's frequency seems to be increasing, for example, it has happened twice while typing this update. **Update: Firefox is now crashing periodically, although with much less frequency than the beach-ball attacks.