Apparently some people have reported that their 2G iPod Nanos make a high pitched noise when they’re in use…

 I have to admit that I hadn’t really noticed, but if I put my ear to mine (8GB black) then I can just about hear it, and I have pretty sensitive ears to squealing noises!

I suspect it’s probably the inverter for the backlight as it stops making a noise when the screen lighting goes off.

Meh :)