I'm having the oddest issue on my 722k. I have ONE local channel that is not having any volume during commercials. The commercials for that same channel play fine on my other two high def non-dvr receivers. I did a reset and now get volume on SOME commercials. I then tried to see if it was a specific audio type that wasn't playing. All commercials during the last break were in Dolby digital, but still only every other commercial had any volume. I don't think it is an AVR issue since it doesn't seem to be related to a specific audio type and resetting the sat receiver did at least change the behavior. Any ideas of things to try before I give up and make the dreaded tech support call?