My father-in-law's 811 had a problem with outputting audio correctly to his RCA A/V receiver. Regardless of the option chosen (Dolby Digital, PCM, Dolby Digital/PCM) there was some type of issue with the sound not outputting correctly. He has spent a lot of time with Dish technical staff on the phone walking through everything they could try (and yes, he has confirmed it is not the optical cable). They indicated they would note this problem for their engineers and are looking for anyone else who may be experiencing this issue, particularly anyone with an RCA A/V receiver. By the way, my father-in-law picked up another 811 from the installer's place yesterday and switched them out. Same problem on both 811's.
Stacy
Stacy