Hi - I've had my black Macbook (early 2008) running Leopard for just over a year now, and I've had a pretty persistent problem (since November or so). A lot of different things that are even somewhat CPU intensive seem to always make my fan go crazy (up to ~6200 RPM), and a look at Activity Monitor shows that they're taking up 100% CPU. Here's a few things that sometimes make it happen: -Finder, when I'm in a folder with video files (doesn't happen with every video, but with certain videos it always happens - Activity Monitor says Finder is running over 100% CPU and I need to relaunch it to get it to stop!) -Flash videos in Mozilla/YouTube -Any kind of game utilizing some amount of graphics -Running a Windows virtual machine (sometimes) I really doubt these things are actually that CPU intensive, so something's wrong. Any ideas?