The only handshake issue I have experienced is between the 975 and my Samsung TV. If the 975 is turned on first there have been rare instances the 975 to TV handshake will fail. As long as the TV is turned on first the remainder of the power on sequence does not seem to matter. I am guessing this has something to do with the ARC function.

I have never had the 975 change settings on its own. It will be interesting to hear from Ben.