Continuity mistake: When Edmund first enters Narnia, he is attacked by the White Witch's henchman, who pushes him into the snow. In some shots, there is a considerable amount of snow in his ear, and in others, its completely gone. This switches several times. (00:29:15)
Continuity mistake: When Peter finds the note about the capture of Mr. Tumnus he pulls it down off the nail, ripping the top edge of the paper. In a following shot the top edge of the paper can be seen fully intact, then ripped again. (00:41:20)
Continuity mistake: When Edmund speaks with the White Witch the first time, as he eats the Turkish Delight candy, the amount and pattern of powdered sugar that remains on his lips differs in the following shots, depending on camera angle. (00:31:10)