Continuity mistake: In the ballet studio fight scene, Bella grasps an injured right leg with her left hand. When Bella is in the hospital, the cast is obviously on the left leg which is under the blanket-the silhouette of the leg is straight and much larger than the right leg, which is thinner, flexed and has skin exposed at an area which would have been covered had it been in a bandage or cast. But when she and Edward go to prom, the injured leg is again the right leg, which is in a cast.
Continuity mistake: In the scene right before Edward saves Bella from being crushed by the van, we see her truck parked straight in the parking space and closer to the curb. After Edward pushes her away and the van hits the rear of her truck, it is shown parked farther from the curb, and the back end which was just hit is moved out farther from the curb instead of closer.
Continuity mistake: During baseball game in the clearing, Rosalie's back shot shows her neatly curled hair. Front shot, her hair is kind of a mess.
Continuity mistake: When running through and marking trees, Rosalie's hair is flat and wilted. When Alice sees them stop due to James switching directions, Rosalie's hair is suddenly perfect.