I am basically prepping movies for playback on a flie server for a tv network. we pull in movies, segment them, export them as QTs and then flip them in Flipfactory, to mpg2. my experience is that ocasionally i will end up using this double image frame as the frame i cut out to make my segments. sometimes its just convinient that way. Other time i leave them alone and they play fine. I cant see them in playback and they have no effect on anything i do. I think what this is is a pulldown function that is blending frames, and randomly comes across two individual frames (from xfered movie) on iether side of a blended frame (on master).
Theses movies are studio release films from film laid to digi tape.