This is my second premiere and third cable card. This TIVo sits next to the THX one that has no problems and is off of the same splitter. The premier measures a signal strength of 77% - 89% when the other TIVo is a constant 95%. A cable amplifier was installed to just the premier TIVo but it changed nothing. Mostly HD channels freeze and pixelate. By changing the channel, sometimes the freezing will stop for a short time. Comcast has no idea what is causing this. Has anyone experienced a similar problem? This all started in early April when Comcast started shifting and duplicating HD channels from 200 to 800. I am in Delaware. Any help would be GREATLY appreciated as I have lost two TIVos since April due to hard drive failures from uncorrected and corrected errors totaling over 50,000.