Continuity mistake: When Lucy is at the lamppost the first time, in one shot she has her right hand on the post, in the next overhead shot, her left hand is on the post. The next shot, her right hand is back on the post. There is no time for her to switch hands. (00:13:35)
Continuity mistake: When the train is pulling away from the station, the Penvesie children are leaning out a door window waving, and the small compartment window next to them is open, with hands sticking out, waving goodbye. In the following shot no hands are sticking out the window. (00:05:00)
Continuity mistake: When Edmund first enters Narnia, he falls backwards out of the last of the coats and onto the snow. There is a close-up shot of Edmund as he lands on his back, and we can see a sprinkling of snow already on the front of his robe. In the next shot, he sits up, and the front of his robe is immaculate. (00:27:20)
Continuity mistake: When the Pevensies are playing hide-and-seek, there's a shot of Lucy running up the stairs. If you look closely, she is wearing the dress that she wears in her third time to Narnia, not the dress that she was wearing when she goes through the wardrobe into Narnia for the first time. (00:10:55)
Continuity mistake: When Peter, Susan, Lucy and the Beavers arrive to Aslan's camp and see Oreius, his body is all black. In the battle you can see that Oreius has black legs up to his knees, but then his body is brown. It's easy to see just when the Minotaur drops from Oreius's back: the stomach is brown.
Continuity mistake: When the Pevensie children leave Mr. Tumnus' home they hear noises outside, so Susan places her hand on Peter's arm and Peter holds her hand. Just before Beaver appears, in the front shot, Susan and Peter remove their hands, but in the next shot they're back on Peter's arm. (00:44:50)