well....i've had my hr20 for 6 days now and experienced my first total freeze up of the unit. i was switching from a local hd channel to cnn.......as it turns out.....about the same time two recordings were about t begin. the screen went black and the unit would not respond. i had to unplug it and restart it. is this a common issue right now.........or maybe i screwed it up because it was about to start to record two shows at once right at the same time i changed the channel.