I have about 20 gigabytes of music on my computer, some of which I don't need on my ipod. Is there anyway to mark them not to be synced automatically other than unchecking them? Another unrelated question is about the clickwheel. I got a white one because I think it looks better... is it normal for there to be a slight gap to the left side of the clickwheel. The wheel doesn't move, and it seems to cast an intended shadow behind the clickwheel.