That's the only time I touch it, too - accidentally. Fortunately I always remember that a non-moving focus point is not a camera problem.Every once in awhile, I accidentally move the focus selector lock without knowing it. Then when I can't move the focus selector, I turn the camera on and off. When that doesn't solve the problem, I take the battery out and return it. When that and a few other things don't help, I eventually get desperate enough to remember to look at the position of the lock.