Just wondering if anyone else tried using an in-line cable signal amplifier to solve the occasional tinny sound problem. I just installed one last night and so far so good. I installed it on the cable from the wall and before the cable box. The instructions say to put it after the cable box but when I did the picture was messed up. It's comforting to know others were having this problem but it's annoying to know that Tivo can't fix it.