I must be an idiot. Just tried to see if I'd have the same problem with my Starship Troopers blu ray. Put it in, selected Dolby TrueHD and it worked perfectly. After I made the tweaks on my blu ray player that successfully changed the format on my receiver screen from "multi chan in" to "Dolby Digital" I must've forgotten to select Dolby TrueHD on the Dark Knight blu ray. Glad everything is working now. Just seeing my receiver read "Dolby TrueHD" seems to make the movies sound better. Thanks for your help...I feel like a dummy though.