Before, I would use my MBP on my desk all day and run as many as 5 apps in the background and it would run perfectly without overheating. Now, for some reason, It keeps getting really hot and the fan starts going at an average of 3300 RPM. Why does it keep doing this? The only things I always run in the background are iTunes, Safari, and MSN or iChat sometimes. It didn't do this before?? I ran Activity Monitor and the only thing taking a lot of CPU is iTunes. The fan still goes when its closed. I know that the fan is always running, but we all know it goes faster when it overheats. Its not a really bad overheat, but it gets there. What should I do or what could it be? Thanks!