Thank god it's not just me. I was freaking out for a while thinking my box was dying before my eyes. Both HR21s wouldn't respond to remote or front panel buttons. Was watching live TV on one of them and it froze after I pressed menu and selected "manage recordings," but the picture was still running in the upper right corner. RBR brought it back but it froze again soon after. Only receiver working is my D12. BTW, both HR21s have been on the latest software x03DE since it first released.
I don't know what was worse-That my machine was not working when I got up, or it was stuck on an infomercial. Both were torture.