I have a 2 ghz 2 gb ram, Intel Core Duo MBP. In the last two days it has begun overheat way more so than usual. While doing fairly normal amounts of work the CPU will heat way past its typical 140-150 degrees F. It climbs into the 180s and I've seen it spike in the 190s!!! The fans then accelerate to over 5000 rpms and its totally freaking me out. It has hardly ever done this in 9 months or so of ownership. Suggestions?