You are not alone. If I record something on KNTV channel 11 on my VIP211 the video sync is terrible. Breakup every few seconds to once or twice a minute. Almost impossible to watch. I don't get this channel OTA well enough to record so my experience is with the Dish provided channel 11.
I haven't noticed this on my 722 but it has other problems unrelated to the LIL OTA programs.
I've been kinda waiting until the dust settles on the transition from analog to digital at the stations before I register my complaints to Dish. Luckily this is summer time and not too much to watch from the networks until fall rolls around again.
A few weeks ago there was a problem with KTVU 2 and I also believe KGO 7. I also witnessed it on KCBA 35 -Monterey. The problem seems to be rotating around to all the Bay Area stations.