Yeah, I see what you're saying there. But, I can say, that when I flip it from Pro Logic II Movie to Dolby Digital, there is a significant change in sound. So, sound processing is changing. I don't think it is just a display issue.

I've noticed before when watching stuff in Pro Logic II Movie that the center channel sounds different (even maybe louder) than items in Dolby Digital and that for example is what I notice when I change this to Dolby Digital (front soundstage is smoother across the board and center is less pronounced).

Yeah, I've never experienced audio dropout, so that is good. But I'm thinking it is more of a bug with the 990 not auto-switching to the proper processing mode. It almost seems like it can see the Dolby Digital signal coming in, but doesn't switch to Dolby Digital.

Too bad I didn't have another 990 I could plug in and use for a week or something and see if it does it also.