I've got an iPod Nano whose wheel is ridiculously sensitive. Every time I touch the wheel, it thinks I'm trying to change the volume, and often a lot of times I'm taking my finger off the wheel it'll change the volume, too. It's so bad that probably 80% of the time I take my finger off the wheel, after a simple press down to skip a song, the volume will jump up, or down, by 50% of the bar width, instantly. Has anybody else had this kind of problem?