I just received my new MacBook Pro (2.4GHz) to replace my older CD Macbook Pro from 2006 which was suffering fan problems. My new MBP is great and faster, with the exception of a really annoying "popping" sound that is coming from the left hand side of the laptop. It's sporadic and might happen every few minutes, or every 30 sec. or varying lengths of time in-between "pops." I searched the forum hear and didn't come up with virtually anything at all, but the Apple Support Discussions had several threads on the topic, most pointing to the Hard Drive and the sound possibly coming from the heads parking on the disk. Could anyone offer any advice on the subject? I just got this brand new MBP from AppleCare and really don't want to have to go through all the work on getting another replacement if this sound is normal.