I waited until yesterday to get my 3D version of DotM. While watching it I noticed I didn't have any surround sound. It was just stereo with the center channel (how my amp blends it). No biggy, it probably picked the lower quality stream by default. So I change it to 7.1 and... nothing. It was still using the 2 channel audio. I tried the 5.1 Descrete (what is Descrete Dolby Digital, BTW?) and the same thing. I tried restarting my PS3 and manually selecting the different audio before it started. Although switching audio during playback to the other languages obviously worked. My point is, no matter what track I tried it was only in stereo. I watch blu-rays often enough to know my setup handles it. I do have a full 7.1 amp and speakers. Even Netflix uses 5.1 properly on supported videos. But no matter what I did I couldn't get surround from DotM. My primary suspect at this point is that I use optical cable for the audio. My amp does not accept audio input from HDMI (its a bit older). Has anyone noticed any problems like this before with other titles?