Hey guys i have the new alum macbook, and I'm not sure if its always been making this noise or not. It's not too loud but pretty annoying for a new 1500 computer. It kinda sounds like the fan is slightly grinding up against something, or its the hard drive at work. It keeps going off like and is sporadic, even when the computer is on a stable surface. I've had the thing in my backpack a few times so maybe it has moved some stuff around? anyways does anybody else have this problem, im trying to figure out if i should exchange it for another one.