Re: House season 5
Both of the Fox HD feeds here in Calgary (KCPQ out of Tacoma, and WUHF out of Rochester) always ALWAYS have audio drop-outs. It's reached the point where I now PVR both feeds for shows we watch (House, Fringe, Sarah Connor, Kitchen Nightmares, etc), just to make sure we can watch them every week.
Last week, because of a scheduling conflict, we were unable to record the early NY feed for Fringe, so we were forced to rely on the west coast feed from WA. Alas, there was literally zero audio the entire time, but of course, as soon as the news came on, it was back! We were forced to watch the *shudder* standard-def feed on the Canadian affiliate

This week, House (on the east coast feed) had audio drop outs about every 30 seconds during the last 20 minutes, and Sarah Connor had them throughout (though they were rare).
Fox sucks for audio here in Calgary. At least their picture quality is pretty good. Nothing beats CBC's WWJD out of Detroit, however. Razor sharp image, clean sound, and the commercials aren't broadcast 10x the normal volume.