Channel 9.1 stutters when played in Media Center but when played directly in Video Lan Player, it plays perfectly. I have tried all video player choices (Enhanced, 9, 7, legacy) and they all reveal the same result. Enhanced playback is the only one that actually works. At first I thought my computer was too slow but since it works in VLC and I can also see CPU usage well below 100%, it seems that there is something else wrong.
I should point out that several other high-def channels play fine, including 1080i channels. It is only this one channel. The signal is also great so that should not be contributing to the problem.
I am using the HDHomeRun tuner box.
Addition: another system I have doesn't show anything on 720p channels. It plays 1080i and 480i channels with no problem. So something is causing problems for me with 720p (obviously).