I was playing Tristan Pinball yesterday and suddenly noticed that shake function simply wont work on my iPad 2 anymore. When Im trying to shake the device to nudge the virtual pinball machine nothing happens. I did some tests in Coin Drop! game (it requires a lot of shaking too) again, nothing. In RealRacing HD accelerometer works absolutely fine. I can steer by tilting iPad. And iPad does recognize landscape and portrait mode. Tried to reset the device but problem is still there. Any tips?