I got this tonight briefly while watching HBO2E (Transformers).
"Attention 005 - Your smart card does not currently have authorization to view or purchase this program."
It was preceded by a brief moment of pixelization, then cleared itself. If was recorded onto the drive so I could replay it to copy down what was on the screen. First video blanking last night now this. Anything to worry about? 3 week old 722. A search turned up a similar event on a 322 a long while back.