I'm still not certain what the answer is for this one. It doesn't appear to have been mentioned yet in the thread, but are you running a 5.1 speaker setup? If you have a 6.1 or 7.1 setup, I'd be curious to know what happens when you switch to Dolby Digital with CES. (For that matter, have you tried using Pro Logic II with a Dolby 2.0 source like Seinfeld or Frasier?) If you haven't done so already, you might also touch base with Outlaw Support .