"Deinterlacing artifacts were visible throughout the clip, showing as horizontal combing in every bit of motion and in every shot transition. Speaking with my friends that I attended with, they all saw it clear as day as well. Not good. I’m rather lousy at understanding IVTC, but what I saw on screen was not acceptable."
I'm not sure what he meant about "deinterlacing artifacts" but horizontal combing during motion would be the result of an interlaced image based upon what I know of interlacing. That probably means the source was missing that data. Perhaps they were showing the films on a crappy interlaced projector? I doubt it.