Last night trying to watch the National geographic HD channel at 8:00pm I got that horrible video freeze (again) that would occur ever 5 secs or so plus audio drop outs and pixelation. I already had a tech out to check this out and he said all the levels at all my DVR's are just fine. I unplugged the DVR and rebooted it a few times within the hour show to be able watch the show but to no avail. Also, major "lip sync" audio lag on NBC HD until I rebooted. I have (3) 7216 DVR's and I am getting sick of having to unplug them and reboot several times a week not to mention the constant audio drops (2 of them) every time I come out of a fast forward, rewind or pause. They say IMG 1.6.1 or 1.7 will fix some of these problems but my family is really getting fed up with the problems.