Hey all, I own a 2.2 Core 2 Duo 15" with 2GB ram. Some interesting things I have noticed lately. When I use expose to window all of my applications, the animation is very choppy and not fluid at all. It doesn't happen all the time, but it does happen more often than not. And the difference is VERY noticeable Secondly, I'm not sure which hardware component is located under the left speaker (or in that general area), but it seems like its working way too hard most of the time. I can feel it moving when I put my hand over the speaker. And that is usually in conjunction when expose is slow to respond as well. For instance, right now its working like a charm. Expose is quick and fluid, and my computer is quiet and nothing is churning under the speaker. Any ideas? Do I have a bum HD? It's embarrassing that expose responds better on my 5 year old PB than my 3 week old MBP.