new bug identified and I think this is the answer to the undersizing issue!
it's provisionally called the'static' bug
it greatly affects movies with 2.35:1 aspect ratio that have black bars within the actual frame image as I found out with Road To Perdition tests just now
this will affect any DVD that has black bars included within the image, but it will also affect DVD's that have long periods of darker images and also showing the same image during continous frames
more detail HERE
hope Pinnacle see this