Hi everyone, longtime lurker, first time poster here. I recently got a 2.4 GHz Unibody MBP, and I'm loving it. However, I have noticed that whenever my fans start going above the normal speed of 2000 RPM, I can feel a slight vibration on the left side of my keyboard. At 3000 RPM, I can barely feel it with the tips of my fingers, but at 4000 RPM it becomes very noticeable. Can you fellow Late 2008 MBP owners confirm whether this is normal? I haven't managed to find any useful info via Google. It's not a big problem, but it does detract from the otherwise solid feel of my MBP. Thanks in advance!