I am noticing that since I have an ibook with 256mb of ram, and a HD almost full (11 left out of 60gb) that when I wake my computer from a sleep, the fan comes on. It never used to do this before. The fan would turn on for about 20 seconds, then it turns off. I was just wondering if I should be worried, or is the noise the way an ibook indicated it needs more ram. (I really need to buy Ram, I know).