Oh! Also... there were times I had no sound with the Reference setting! None. Every other setting worked but Reference. I fought and fought with it and it *seems* like it happens when I go into "Speaker Detection Results" and/or "Audyssey Settings" and change something before sending it to my receiver. It's almost always the reference setting, but it did happen one time with the flat setting.
Now that was a weird one and I was at a loss.