Hi all. I just did a fresh install of Lion in my machine, after using SL for about 3 days again. The objective behind this was to try and fix my crazy fans, which, since upgrading to Lion, will run at ridiculously high speeds, even if I am just using 3% of the CPU, and at a temperature below 50C. I have tried SMC and PRAM resets, cleaning the fans, and nothing. This seems to be a glitch in Lion. Has anyone else suffered from the same problem? If so, did you manage to fix it? Here's a screen from iStat Pro: Another note is that my fan speeds no longer increase on a scale, they just boom from 2000 to 6500RPM in a second, and stay there for a while, and then go back to normal. This happens even when I'm not running absolutely anything. Just watching my desktop.