Andy Pennell is having trouble with a recent upgrade to his HDTV recording DirecTiVo box. Ever since the 3.1.5.d OS upgrade came out, HDTiVo owners are reporting locked up remotes, bad playback, and satellite connection problems.
I'm a little bit surprised DirecTV doesn't do more testing before deployment. They only support maybe a dozen different models of TiVo configuration, and it seems that having a bank of test boxes with maybe four of each model recording and playing back TV would be enough to catch most of these problems before the code gets deployed to customers. [thanks Andy!]