I have had to reboot a number of times since getting the new TiVo HD unit but it always seems to happen when I am leaving the Podcast area, playing streamed music or switching over from playing a game a to the Now Showing screen. When it freezes I get a black background behind the TiVo user interface and no TV shows can be viewed. My multistream cablecard seems to be holding up well and I am patiently awaiting the magic "dongle" arrival. CNN and other new HD stations have been added but are not activated (?) yet.