For some reason the screensaver on my HR20 goes on once in a while during playback. I can return to the show by pressing PLAY. It happened once before and I thought it was a fluke. But tonight it happened three times on one 30 minute HD playback.
I have noticed the screensaver does works correctly by turning on after a pause of 5 minutes or so. But I don't have a clue why this other interuption happens during active playback. (If you are not familiar with the screensaver, the screen goes blank and the D* logo floats around and bounces off the edges.)
Probably just another glitch D* has to fix in due time.