Well I am having a buzzing issue coming from the left side of my macbook 2.2GHz SR. It can only be heard in a quite room. I think it is the same issue that other owners have noticed. I returned one macbook because of the noise and now my new one does the same thing. I got the new one from a Apple Store, does anyone know if I can "downgrade" to the 2.16GHz model? Do Apple Stores still have those in stock. I know people might think I am nuts but the buzzing is extremely annoying and I would much rather have a great working older model than the newest model.