I have a 722 that is acting up. If I wish to rewind and watch a replay of anything, it will start playing where I stopped the rewind, play for a minute or so, then:rant: suddenly go back to live TV. I use this function a lot especially for sports and it has gotten very annoying. Anyone else experience this problem or know how to fix it? I even did a complete factory default setup and reboot, but it did not fix the problem. Nothing on the menu seems to apply to this. I appears as though this may be some kind DVD hard drive malfunction