Revealing mistake: Right at the end of the fight between Selene and the Uber-Lycan in the vampire coven, the Uber-Lycan throws Selene into some wooden panels, knocking her unconscious. As she travels through the air you can tell that she is suspended by wires; she travels far too slowly towards the wooden panels for someone who was just thrown. (00:48:35)
Revealing mistake: When Snow White rides the white horse bareback to the dark wood. In the last few frames as the horse gets trapped in the mud you can see a very thin set of reins attached to the horse's head.
Revealing mistake: When there is a flashback of Thorin in the war, in the first few seconds, on the left of the screen, there is a man with a shield. He swings it at an ogre and you can see it misses by a good five inches, but the ogre moves his head back as if it were hit.
Revealing mistake: In the final battle scene, when Edward does a flip around (and then breaks someone's head off), as he flips, you can see that the stunt double doing the flip looks totally different - taller, thinner, lankier, different face and hair.
Revealing mistake: During Jack's memories, when he is holding the antlers up to his head, Jack's sister's boot can be seen coming through the fabric of her dress.