Hmm... I've been using my new 15" for a few days now and I love it. It's really gorgeous. But yesterday night, I started to notice a weird whining sound I hadn't heard before. It stops when there is activity on the screen (e.g. scrolling in Safari), so I guess it is related to the graphics card. Anybody heard about it? It's quite annoying, and I have no idea what to do to stop it.