Continuity mistake: When Bella is in the parking lot at school in the beginning, Edward walks toward her. Bella's hair is neatly pulled off to the side. When he leans in for the kiss it is suddenly stuck to her forehead, and when Edward tells her Jacob wants her, it's suddenly back to normal.
Continuity mistake: Bella just went back to the meadow and is talking to Laurent. Throughout the whole scene in the meadow, her hair changes on her right ear. It goes from behind the ear, to fully covering the ear, to half covering the ear, and back and forth between those. And in the beginning, her hair is near perfect, but by the end, her hair is more wispy and not-so-matted to her head.
Continuity mistake: Right before Jacob comes through Bella's window, it shows her sleeping and "dreaming" of Victoria coming to get her. If you look, the camera really focuses on the dreamcatcher and how it's hanging above her on the bedpost. It is hanging off to the side of the middle hump. Immediately, Jacob comes through her window and focuses in on the dreamcatcher hanging on the bedpost which is now neatly hanging in a completely different way, perfectly laid over the center of the bedpost.
Continuity mistake: In the Volturi Chamber, when Aro moves forward to kill Bella after he says it's a sadness because Edward does not intend to give her immortality, you can see Alice's hair and part of her face along the right side of the screen. Actually, at this point Alice is standing to the left and behind Bella, being held by the neck by Dementri.
Continuity mistake: When Bella is at the cafeteria table with Mike, and he is asking her to a movie, her hair keeps moving from behind her ear to hanging in front, and back again.
Continuity mistake: In the dirt bike scene, Bella takes off and starts to lose control. The camera pans so it is showing her hands on the bike, losing control, and she doesn't have a very stable control on the direction the bike is going. It looks as if she is going toward the right, into a small ditch, about to crash. The camera then shows her face, and she is still in the middle of the road, not close to crashing yet, with decent control of the bike.
Continuity mistake: In the scene where Bella is in the meadow talking to Laurent, Bella's hair is at first straight and then in the next scene it is wispy and pushed back and then it is straight again.
Continuity mistake: In the scene where Carlisle is treating Bella's wound there is a shot of the bowl where he is putting the glass from the wound. You see that there is one piece of gauze. He then starts stitching up the wound and when he lights the contents of the bowl, you see lots more gauze that he hasn't used in there.
Continuity mistake: After the scene where Jacob rescues Bella from the ocean, when they're driving home it's not dark outside as they're pulling up into Charlie's driveway. But once Jacob starts talking about Sam and Emily, it's darker outside. Even after they get to the door.
Continuity mistake: In the scene where Bella jumps off the cliff, Bella's eyes are brown before jumping but are blue/green when she surfaces in the water and then back to brown in the underwater and shore scenes.