Continuity mistake: When Bella is in the hospital, in the close-up of her face, the breathing tubes are right by her eyes, but when the shot is further from her face, the tubes are on her cheeks.
Continuity mistake: When Bella gets out of Edward's car after Port Angeles, she leaves her purse behind and goes home with her father. At home, she has the book she bought at the store and put in her purse that she left in the car.
Continuity mistake: When leaving from the baseball scene, Emmett's jeep goes from being dirty on the sides with mud from the tires, to being clean.
Revealing mistake: When Bella sees Waylon's body being gurneyed onto the ambulance, Bella has a flashback of Edward's eyes being black. In the short snippet, you can see the rim of the contacts he's wearing.
Continuity mistake: In the hospital, after the 'almost' car crash when Edward saves Bella, she has a blood pressure cuff on her arm. You can see the nurse take it off. She has it off for a while, but then it reappears on her arm in one shot, just as her dad says "you can kiss your licence goodbye".
Continuity mistake: During the hospital scene, when Edward is "sleeping," his head goes from from leaning on one shoulder to suddenly on the other shoulder in the very next shot. In the top shot there are 2 windows next to Edward's head, but the windows are not there in the next shot. Things on the table have moved too.
Continuity mistake: When Bella enters Biology class and talks to Eric about the prom, she starts to walk, then pauses to look across the room towards Edward. In this shot, the Armadillo is not on the shelf, only what looks like a peice of paper is hanging there. The Armadillo appears on the shelf only after she has sat down at her desk and Edward moves the microscope towards Bella saying, "Ladies first".
Continuity mistake: After Edward saves Bella from being crushed by the van, while he is holding her, Bella's hair is outside of her jacket covering up her hood. When the shot changes her hair is tucked beneath the jacket and the hood is visible. When the shot changes back, her hair is covering up her hood.
Continuity mistake: When the Cullens are in the garage preparing to take Bella to safety, Edward closes the trunk lid twice. First time is not so obvious because the camera is on Emmett and Rosalie, but the trunk closes on the right of the screen. Then it shows it closing again with it being the main shot.
Continuity mistake: In the scene when Bella is in Port Angeles trying to get away form the guys who are taunting her, in one shot, as she is walking through the parking lot, they show two guys walking up from behind her and the other two guys walking toward her. In the shot where the camera shows the two walking toward her, you can see two people dressed in black standing on the deck in the background, and it looks like they go in for a big kiss. The next time the deck in shown in the shot the two people are not there.
Revealing mistake: In the hospital after the car accident, we are first introduced to Carlisle. If you look at his face you can see where the white face makeup doesn't meet his hairline. Patches without makeup can be seen.
Continuity mistake: In the first scene in the cafeteria, when Bella suggests that Angie should run an editorial on "speedo padding on the swim team", she then holds up her food to take a bite with her right hand. However, in the reverse-angle shot, when Angie says "actually, that's a good one", Bella's right hand is seen placed on top of her left arm. Then when it cuts back to Bella, she is again holding the food up to her mouth.
Continuity mistake: In the first biology class, when Edward moves the glass petri dish over to Bella and "hides" one in his hand, a piece of paper is lying crooked between them on Bella's side of the table. In the next shot, both glass dishes are between them, and the paper is on Edward's side, and it's now vertical.
Continuity mistake: When Edward reveals what he is to Bella, the button down shoulder epaulet on his jacket goes from being unbuttoned to being buttoned, throughout the scene.
Continuity mistake: It's nearing the end of the movie. Edward and Bella are dancing under the gazebo. Edward lifts Bella so she is dancing on his feet. The camera later pans onto both of their full bodies dancing. Bella's feet are not on Edward's and she is dancing just fine. It later pans onto both of their full bodies dancing. Bella is on Edward's feet again, dancing.
Continuity mistake: In the baseball scene, in the shot where Carlisle hits the ball and starts running to first base, you see Edward and Emmett in the background also start running to catch the ball. The next shots of Emmett and Edward show them standing still, just preparing to run.