Now I've not seen the film for some time, so bear with me on the details... One obvious mistake occurs when William surrenders (after Murron is killed) and he's riding his horse toward the English encampment (slow motion scene) There are 2 seperate cuts throughout this scene where his hands are behind the back of his neck (I believe the back shot), then on top of his head (front view), then back and forth again...etc. Watch - you'll see!