Sorry if this question has been asked, but I couldn't find it anywhere. Lately, my recorded shows have been having some video problems. The screen becomes scrambled and distorted , usually around people's faces or bodies when they are moving. It happens on more than one channel and I'm worried it's just going to get worse. Does anyone know what this is or how to fix it? (It's the Series 2 DT 80 hour Tivo), I've only had it for about 6 months. Thanks!