Answer to "Why has my iPod click wheel stopped working?"It seems that there is some design flaw on the the new curved casing on the 4th gen. I've been reading through different posts, and this seems to be a recurring problem and needs to be addressed by Apple. After a lot of use, the board/clickwheel loosens up and creates some form of unstable contact. A solution I found is to add a firm backing to it. I did this by inserting a piece of thin plastic (a thin old credit card would do) between the board and the aluminum casing on the bottom end of the iPod. I tried this with 2 of my iPods and it worked. Of course you need to take out the bottom plastic cover and the aluminum connector support with the 2 screws first. Hope this works for you guys. GOOD LUCK!