I dunno, my Pioneer HDTV box has been acting up ever since we plugged in the DVI cable. Whenever we switch from an analog or digital channel to an HDTV channel, a whole lot of white noise is displayed for about 4 seconds before the TV syncs with the box. I thought that kind of weird, since the output from the box is fixed at 1080i (all channels are upconverted to 1080i so the TV shouldn't have to resync.)
I called up a service tech and asked him about it and he said it was because of HDCP taking a few seconds to descramble HD content?? Wack if you ask me.