OK, I made a thread like this around 4 months ago, and bumping it would be against the rules, so... Sometimes, for no apparent reason, my accelerometer will not respond to shakes; eg. if I'm playing TTR, I can hit all the left/right shakes, but not the up/down shakes. Other things that don't work are: Music coverflow, Pictures (turn it sideways), safari landscape, calc landscape, Dice (shake); pretty much anything which you have to shake or tilt the iPod to do. Sometimes, when this happens, I give my iPod to my baby brother with the Photos app running, and me can miraculously fix it. I'm not sure of the cause or the fix but I need help!