I have a 522 with L463 and this is an annoyance I've been noticing for several months now. Every now and then, maybe once every couple hours, the picture will freeze for a second. The audio is unaffected. There's no predicting when it will happen but it occurs on all channels and in live mode and on recorded programs. Is anyone else experiencing this and does DISH know about this problem? I thought for sure it would be fixed by now.