The Tivo and Guide button on the remote, and on the Series 3 box does not work. I would rule out any strange remote / interference / channel / code /1-2 switch issues since the buttons on the S3 don't work. The rest of the buttons, pause, whatever do work. Power cycling usually works, but not always. It happens often enough that it is beginning to piss off the rest of my family and me. Any idea?