Hi I just joined this forum for this thread. I just got the receiver and had the same problem. I originally set everything on the player which is a sony bdp s590 to out put bit stream, then output the receiver to amp.Long story short, I ended up with the same problem just getting LPCM. Then I looked into the arc handshake between the tv (sony kdlhx820). I had recently updated the firmware and the audio out put was changed back to "tv speakers". I change the setting back to "audio system" and it all works now. DTS and TRUE HD. I've tried several discs.Turned the receiver off and on. Its solid.
Glad to be a part of this forum. I've been lurking for a while now. haha.