I'm in Houston on Comcast. Since around May, the NBC and ABC HD channels, as well as Starz HD, will randomly and frequently become so pixelated as to be unwatchable. This makes recording HD primetime shows on NBC and ABC a waste of time, as the odds are that I won't be able to watch what was supposed to record. I've read all the threads. I know there are lots of theories. But has anyone gotten to the bottom of this? Is it a Tivo problem, a cablecard problem, a signal strength problem? It's especially frustrating as there seemed to be a similar problem with the TivoHD, and Tivo seems to have gotten right on that one. For those in Houston who were also experiencing this problem (which I know was with the same channels, at least the ABC and NBC affiliates), has the problem improved? If so, any idea what you did to improve it? I'm pulling my hair out at this point. Any help would be greatly appreciated.