I had this happen to me
Sorry to revive an old thread but i just had this happen to me and i fixed it. It happened because I installed the Extended Preferences into WinterBoard (which gave me cool things like auto-diming and locking). It was a simple case of unselecting it in winterboard and all my other settings options came flooding back. Also the auto dim and locking settings are still set, and work even after a respring.🙂
Hope this helps someone.