Please, please, please, can someone enlighten me? I just got a new aluminum macbook (the less expensive one) from work about a month ago. They also bought me a 4GB ram set, which the notebook is recognizing as 4GB, per the "about this mac" section. However, I get a freaking pinwheel about every hour or so, and I can't figure out why. I am a heavy system user with Firefox 3, Entourage, Word and often iTunes running at the same time. Now I know firefox is a memory beast, but with 4GB of ram? Plus, the pinwheel usually occurs while using Firefox, but it will also happen when I'm using other programs, even Word. It's like it just gets constipated over the smallest thing, like clicking on one thing and then another too soon. The reason I'm so frustrated is that this thing is the cutting-edge laptop with maxed out ram and it is performing worse than my old white macbook 13". I've seen some of the other complaints about the new alumibooks, but mine is built well (no creeking, noise, loose battery covers, etc.). It's just this stupid pinwheel. AAAAAAAAAAAAAAAGGGGGGGGGGGGGGHHHHHHHHH! Thanks in advance.