Hello, I got a Rev. B MacBook last year in Dezember and it had the whine but I figured I'd live with it because it was not loud when it wasn't connected external power and there wasn't even a whine when I used my Bluetooth MM, wich I did most of the time. Now, after I installed Leopard, my MacBook will whine even when I use my mouse and it will only shut up if I move the mouse. I figure it might have something to do with energy saving. Do you have any idea what to do or how to turn the off? Thanks in advance!