DD, I am finding that if you have the DVR or client on, and swap to say a Surround Sound system, you either get no audio output or get Stereo sound. Only way to get DD back, is by switching inputs on the Surround sound receiver/processor from something else and back to the DVR, or shut off the DVR or client and back on, to get the DD to feed through. This of course happens if the DVR or client is on, and you "hot" change from the tv or a soundbar as audio output, to the AVRS. All equipment is connected via hdmi, and never had this issue with my previous provider, just this equipment. Found out my brother who also has the HR44 Genie and C31 equipment, with a different Surround Sound receiver, gets the same problem. I have come across others on other forums, having issues with the HR44 & C31 equipment also having DD issues with Surround Sound not working. As for the RC71, yes it is a cute remote, smaller than the RC6x series, great for the bedroom, but still an infant, that it has its issues with the software still being new, that they are using with it, for RF control. I use a Harmony 650 for the Living room, and use the RC-71 in our bedroom in IR mode, since it was having issues in RF mode in there. As for the shielding suggestion, I think that if the C31 is placed on the back of the flatscreen and it has a heavy RF shielding cover, such as what they are using with Plasma TV sets now, I could see it as causing a problem with not letting the RF signal from the RC71 to the C31 communicate. It would be like trying to shoot it from one side of a Faraday cage to the other, is what I was trying to suggest on this possibility. Really would need more people to set their C31 units up all the same way, have the RC-71 setup in RF mode, and also use them at the same distance, in the same manner, to see what happens. You of course cannot also rule out any type of outside interference around the premise, that could be causing problems also with comm. between the remote & box.