I've been using my new MacBook Air 13" 2011 128gb for about a month now. And tonight I just noticed that it seems if my mac has gotten louder. It's pretty quiet in my room and I've noticed when I scroll down a webpage, I hear my CPU or something. It sounds like a spring decompressing kind of. Have anyone noticed this problem? Do you think there is there something lose in the MacBook? I'm pretty sure if I bring it in a Apple Store, they won't hear it since the room must be very silent to hear it.