Severe frame rate dropping on channel 803 (Atlanta, WSB, ABC, HD)
This evening on routine sitcoms, the picture is running at what appears to be about 10fps producing very jerky motio. This happens on all three HD boxes, and when streaming the channel on my iPad in the Xfiniti app. It does not happen on other channels I've tried. On 803 it is consistent on commercials and program material, and it resumes after the usual reboots. It NOT present on the TVs we have connected to an off-air antenna. Due to a previous problem, a tech has been here in the past two months to check signal, connections, etc, and he replaced all the boxes.
Any other Ideas?