Just got my THR22-100 DirecTV TiVO unit installed a few hours ago...
All is great, except when I change channels, it shows a gray screen for a second or two before showing the next channel. Some of the time (70% of the time), it also goes to a black screen after the gray screen, before showing the newly-chosen channel.
This black screen is actually, in that moment, not putting out a signal to the TV. I know this because my Samsung displays a graphic flagging the particular input chosen when no signal is present OR in the split second after each time a new input (DVD, PSP, DIRECTV) is selected. That particular input graphic now displays each time my unit goes to black with a channel change. Very annoying and cumbersome, especially if you like flipping channels a lot.
This same behavior also happens when I shift from live TV to the Menu settings or the Now Playing List.
Please, fellow THR22-10 owners: tell me your unit does not do this, so I can know I have a defective unit, bad cable or some other easy answer!