All of the new national HD channels look perfect on my setup. My HD locals all look fine, too... save for one. I have had a number of different issues with the signal from the local NBC affiliate, WPXI. I had always assumed that it was something about my system - but a friend recently upgraded to HD (with an HR20) and is seeing some of the same issues, so I don't suspect my setup as much now. NBC network programming has a variety of issues, and they seem to come and go. Sometimes programming is interrupted with brief stutters. This week, it's been lip sync woes. Other times there is picture breakup, and there is nearly always heavy artifacting. My friend's wife prefers to watch the SD channel because the lip sync bothers her more than the standard def picture. WPXI started broadcasting local news in HD earlier this month, and their local HD news broadcasts seem to have none of these issues. That could be coincidence. I haven't watched all that much of their local HD content. But it seems very clean, crisp, and trouble free. It makes me suspect that there may be something wrong either with the way WPXI is handling the HD NBC feed, or with NBC's national feed itself. It's bothersome because I tend to watch more NBC programming than any of the other networks. Has anyone else experienced these issues?