Continuity mistake: During the duel between Miraz and Peter, when they call for a time out, Miraz is shown in the background walking back to his generals and stepping onto a raised area. A few seconds later, over Peter's shoulder, he again walks to the raised area and steps up (there's only one step).
Continuity mistake: When Peter is talking to the White Witch, he has a deep cut above his left eye. when the camera changes to show Edmund stabbing the Witch from behind, Peter is miraculously healed, because in the next screen is Peter sitting down, breathing hard. But look above his left eye. No cut.
Continuity mistake: Near the beginning of the movie, when Peter tears his shirt to make a torch, he tears it at the bottom, from left to right, from one end to the other, creating a long thin strand. However, the rip on his shirt is from his left (viewers right) to about the center of his shirt,in a more round shape.