I have a couple of problems with the TV1 remote on my 722k.
I have programmed the AUX button to turn on and off my surround sound but the mode selector for AUX is irratic, sometimes it lights up when I press it but about 2/3 of the time I have to press the AUX button 2 or 3 times before it lights up red so I can turn on/off my surround sound.
Second is the response of the keys when inputting text for a search or renaming a recording, sometimes the multiple key presses to get letters like r, s c, f, etc. fail and I get the incorrect letter on the screen and have to back up and redo part of the name. This is not an occasional happening, it occurrs usually a couple of times every time I try to enter text. I never had any trouble at all with my old 622 silver remote.
IT seems like the keypad on the new 20.0 IR remote is not as high quality as the old 5.3 IR remotes was.