I have SR MacBook 13" 2.2 GHZ, 2 GB RAM, 160 GB HDD. I've noticed that the fan can rev up pretty loudly sometimes and checking iStat the RPM is sometimes as far as 6200! I've noticed it is almost always while playing flash movies online (eg, playing full episodes of 30 Rock from the NBC web-site). The other time it really revs is when recording video from QuickTime Pro, which I understand more, as that seems very logically to be processor intensive. Does anyone else have this problem? Why do you think Flash would cause the fans to rev when even playing something like a 1080p movie trailer in QuickTime doesn't seem to?