I just recently got my 921 and not sure that this has been brought up or not. I have some previous experience with a 501 and noticed a 'feature' that the 921 has of which I'm not sure is a good thing. On my 501, if I was watching a program, and time-shifted it while I was watching, and then decided to change the channel without being back in live mode, I would get a challenge screen stating something like 'Do you want to switch to live mode?'. Last night, I was watching a show on my 921 that was time-shifted and I hit the recall button to go back to the previous channel I was watching, and it just went to that channel without giving me a challenge screen to switch to live mode. Any ideas? I didn't try it with the guide to see if the same thing happened there too? It was getting late already.