I'm really mad! My S3 stopped responding and got stuck in a reboot loop last night. I called Tivo today and they said my unit needs to be replaced. I got it in January. They want to charge me $50 to exchange the unit, AND I have to pay return shipping! This is obscene! It's within warranty (one year), and they have the chutzpah to charge me to exchange a machine that THEY need to be responsible for? Has anyone else had this experience?