It doesn't happen every time, but enough to notice. Wondering if anyone else has experienced this... Here's the situation. With the 722 engaged and recording two other HD programs, we're watching a program that was previously recorded. After reaching the end of the recorded program and deleting (with the two other programs still being recorded), my screen has gone blank (totally black) with no sound -- eventually the "Lost Signal" error message is displayed. I have not seen this occur when only one program is being recorded. I think if I omit deleting the program, the problem doesn't occur. Anybody else experience this?