Ever since I've had HR20-700s I have had a recurring problem with FOXHD-OTA which in Louisville is 41-1. Live programs will freeze at various intervals during realtime viewing. When I play back the programs they always play without freezing. This only happens with FoxHD-OTA. It does not happen with Fox HD via the DirecTv feed. It has been consistent over multiple software NRs. This has been going on for more than a year. It happens with my attic mounted antenna and an indoor antenna I use for the 700 in the master bedroom.