This has happened occasionally while watching YES HD (about 3 times in the last week or so). Has this happened to anybody else? Is it the HR20 or the YES HD channel. What happens is the picture just freezes out of the blue and there will be no sound. The box is completely responsive and all I have to do is change the channel and then change it back to get everything working again. No reboot is necessary. Any experience this? I just rebooted now just to "clean" the system. See if it happens for a while.