Rewind no longer working after channel change?
I could be remembering it wrong, but I am sure I used to be able to rewind a channel after I had been watching it a while and then changed channels and then changed back. Now, it seems that when I change channels and then go back (A -> B -> A), that channel (A) is no longer rewindable. Actually, it seems like it is only certain channel that do this, but I can't figure out the pattern. Does anyone know if this behavior changed recently and why?