I seem to have found a bug with the DVR Scheduler (m.directv.com) for mobile devices. It seems that since the HD Extra pack was moved to the 500's, those channels have disappeared from the service. I've tried searching for shows on those channels, the channel name ("MGMHD" for example) and even the channel number. Nothing comes up. This means it's impossible to schedule shows on these channels remotely or browse a channel-by-channel schedule, which is something the full TV list at the DirecTV main site cannot seem to do. The affected channels are Hallmark Movies, MGM, HDNet Movies, Palladia, Universal, Crime & Investigation and Smithsonian. Also, on a lark, I put in the title of one of the newer premium HD channels, SHNXHD (I guess this is Showtime Extreme HD?) It didn't come up, either. I'd call DirecTV about this but the CSRs are clueless when it comes to the DVR Scheduler.