I recently purchased a refurbished 15" PB 1.33 GHz. And so far it is doing pretty well. Except for a couple of things. I already made one thread that no one responded to about the some difficulties with the keyboard. But more recently I have noticed that the fan makes a horrible noise when it comes on when I put heavy loads on the processor. On my old 12" PB when the processor was loaded the fan would come on and you would hear a nice quiet whir, like a cat purring (you know, the tiger under the hood!). Well with the 15" PB when the fan comes on it sounds like a kid ridding a bicycle with a baseball card in the spokes!!! Not a smooth quiet purr. So, should I call Apple? or stop by the store? I know with the fan sound they will want me to reproduce it, so is there any simple way just to load the processor to heat things up? Or does anyone know a simple fix? like hit it right on the 57 to get it to re-align the fan so it will spin quietly. Thanks!