I just got my 5th or 6th replacement 522 a month ago, and I noticed that the TV1 and TV2 tuners are not shutting off overnight like the old 522 boxes used to (when I don't have anything set to record). Is this really a big deal? I've gone though so many 522 receivers I think the tuners shutting off for a few hours overnight may be a longevity issue. Maybe not. What do you guys think?