Ever been to the Tivo community? There're tons of threads about HDTivo problems there. In fact, there's a recent thread asking if anyone DIDN'T have any problems yet.

Most of the problems are HDMI failures. The next biggest is usually HDD, but that's pretty standard for DVRs in general.

It's been quite the mess, as your statistics indicate. More recent models should be better, but now they will be phased out soon for NDS boxes and MPEG4. If it wasn't for the combo: Tivo+HD....nobody would buy these things.