I started noticing a couple weeks ago that the fans on my 15" PB tend to spin up quite early when I'm doing something as innocuous as watching a Youtube clip. The base seems to get quite hot as well. I'm pretty sure I've had a couple freezes because of this issue - I run a few programs simultaneously, and then wham! Everything locks up and I have to reboot from scratch. I'm running on normal performance settings, the thing is raised up on a iCurve, and I'm sitting next to the A/C. Time to open it up and dust it out or what? Any advice? Thanks in advance.