My HD PPV channels keep appearing and disappearing from the guide. I only have one HD PPV channel as of this morning (960). I assume it's related to the appearance of the NFL Sunday Ticket feeds? Also, NFL Network SD appeared on my guide yesterday on 121 and appears to be permanent, not Free Preview. NFL RedZone HD has appeared on Free Preview on 476. NFL Sunday Ticket is on 477-490, also Free Preview - I presume they are also HD. All #'s Advanced line-up.