I've noticed that my accelerometer is about 95% accurate but is always slightly off. I've noticed this primarily because of two applications, cube runner and A level.... When I would calibrate cube runner on a flat surface (determined by a real level) and then play the game, the controls would be slightly off. Doing the same thing with the level program, putting the ipod against a real level indicated the accelerometer was off by a number of degrees... How accurate is your accelerometer? Is it supposed to be 100% accurate?