My unit has stuttering problem. This problem mostly affects OTA recordings (although some mpeg2 channels have this problem too). Few times an hour the unit will go into stuttering stage when for 5-15 seconds picture stops/start/pixaltes. Sometimes picture completely stops up to 30 sec. Often, if I replay the fragment of the recording it plays fine. I've had this problem since I got the replacement receiver two months ago. My previous receiver was HR20 and I had zero problems with that unit until it died.
Have you experience this problem? My unit might be just bad.
I'm running HR21-700 + AM21 and my OTA signal is very strong.