•Continuity: While Bella is in the hospital (for the second time) it shows the first shot of her eyes and nose. She has oxygen tubes running to her nose. The tubes are over top of her eyes, but when the camera zooms out the tubes are nowhere near her eyes. Then it zooms back in and the tubes are at her eyes again, and so on.
•Continuity: When Edward drops Bella off at the police station on the way back from Port Angeles, she doesn’t have her bag, which contained the book she picked up from the book store that she uses later on to research the “cold ones”.
•Revealing mistakes: When Charlie gives Bella the mace, he hands her a green can. Green cans are inert and used for training purposes.
•Incorrectly regarded as goofs: The vampires are revealed to sparkle when exposed in the sun. However, when Edward and Bella come to school, he is seen to be wearing sunglasses, an item that would not be necessary if he was trying to avoid the sun. However, it’s clear he is wearing them as a fashion accessory.
•Continuity: When Bella is in the forest to confront Edward on who he is the flap on his right shoulder of the jacket Edward is wearing is buttoned down, in the following scene, unbuttoned, then buttoned again.
•Incorrectly regarded as goofs: When Edward is telling Bella how much he could hurt her, his hand on the tree goes from being flat against it, to resting on his fingers and back again. However, in the the books vampires are much faster than humans and Edward could have easily moved his hand without it being seen on film.
•Revealing mistakes: In the scene with Edward and Bella talking in the cafeteria (when she drops the apple and he catches it) it is apparent that he has pit stains. Vampires don’t sweat.
•Incorrectly regarded as goofs: When Bella is confronting Edward about being a vampire, there are what appears to be visible bite marks on the left side of his neck. However, these are moles, not bite marks.
•Incorrectly regarded as goofs: There’s a scene where Edward and Bella are talking in the forest, it’s raining heavily and they are soaking wet. Soon after they are shown talking in another forest location, and appear to be completely dry. This could, however, indicate the passage of time, especially given their change of clothes. It is therefore assumed that their conversation takes place over several days.
•Continuity: It’s been stated many times that the vampires do not change at all, ever. Yet Edward has varying degrees of stubble throughout the film.
•Miscellaneous: In the final credits, “Emmett” is misspelled.
•Incorrectly regarded as goofs: In the scene in the garage, Edward asks Rosalie and Esme to put on Bella’s clothing to mislead the tracker. Edward is shown throwing clothes towards Esme. Esme was in the scene for quite a while, getting stuff in the background. She was just out of frame when he actually addressed her.
•Incorrectly regarded as goofs: In the garage scene, Rosalie and Emmett are seen putting their belongings in Emmett’s jeep and getting in. In the next shot, the jeep is no longer in the garage, and the two cars being taken are Rosalie’s convertible and Carlisle’s Mercedes. However, the jeep hasn’t left the garage yet – it’s just out of frame in the next shot. Esme takes Rosalie’s convertible which is why it leaves the same time as Carlisle’s Mercedes.
•Incorrectly regarded as goofs: Edward says in the movie that vampires never sleep but when Bella wakes up from sleeping in the hospital he also appears to be sleeping. In fact, he was pretending to sleep in order to appear normal, and to give Bella and her mom privacy to talk.
•Incorrectly regarded as goofs: In the very last scene, Victoria turns to leave the balcony overlooking the gazebo where Bella and Edward are dancing, with her hair tied up. As the camera cuts to her leaving down the stairs, her hair can be seen flowing behind her. However, Victoria actually reaches up and pulls out her hair pin just as she reaches the top of the stairs.
•Incorrectly regarded as goofs: In the scene where Bella goes to the ballet studio to give herself up for her mother, James the vampire is visible in all of the mirrors. As the legend goes, vampires’ reflections are not supposed to be seen in mirrors. Yet both the movie and books often diverge from traditional vampiric legends, such as mirror reflections, burning in sunlight, wooden stakes, repelling from crosses, and so on.
•Incorrectly regarded as goofs: When Charlie takes Bella to her room you see three naked Barbies in her room. One is on her desk under the bulletin board and the other two are on the wall behind her, near the bulletin board. As the movie continues they have disappeared. As Bella makes the room her own with her own items, it is inevitable that she moves things around, including the Barbies.
•Continuity: When Charlie is telling Bella that the security guard had been killed by the “animal,” you can clearly hear that it is raining but neither Bella nor Charlie are getting wet and no rain can be seen.
•Revealing mistakes: Throughout the entire movie the vampires’ contact lenses are clearly visible in close ups. For example, during Bella’s flashback after the car accident, you see a close-up of Edward’s eye – the outer rim of the contacts Robert Pattinson is wearing is distinctly visible.
•Incorrectly regarded as goofs: When Edward brings Bella to meet his family, Rosalie (Nikki Reed) is wearing gloves to protect her hands from the shatter-bowl she is holding. However, this could also have been a normal accessory to her outfit, much like a jacket or coat, in an effort to appear human; especially considering the temperature of Forks, Washington.
•Incorrectly regarded as goofs: After Edward saves Bella from the car crash, she overhears him, Carlisle and Rosalie talking in the hospital. Vampires are usually so fast and low that human ears cannot understand it, but they can also talk quickly and quietly – in this instance there were other people around, thus the reason they were talking “human”.
•Continuity: Throughout the film, dark roots appear and disappear from Rosalie’s hair. This is due to the fact Nikki Reed’s hair is naturally very dark instead of blonde.
•Continuity: When Bella confronts Edward, her red book bag on the left of the screen seems to flip and move around in different shots on the scene.
•Incorrectly regarded as goofs: James, Laurent and Victoria not noticing the fact Bella was human when they first arrived at the baseball field. Not only would they smell her blood (James in particular, being a tracker) but their enhanced hearing would allow them to hear her heart beating. However, in the books, the three arrive at the baseball field, and are there for a few minutes before the wind blows Bella’s scent to them, alerting them that she is human.
•Incorrectly regarded as goofs: Victoria’s presence going unnoticed at prom. Edward can read minds, Alice can see the future and all of the Cullens have enhanced vampire senses so the chances of her going by unnoticed is highly unlikely. While some have said it is possible that Alice would not be focusing on Victoria and Edward was too preoccupied with Bella to hear Victoria’s thoughts, Edward specifically says to Bella (right after Alice sees James change course) “the woman is still in the area”. Knowing that Victoria was still in Forks, Edward and Alice would certainly still be keeping an eye out for her and since Edward had heard Victoria’s thoughts and voice already, he would know what to listen for. He definitely should have noticed her at the prom, however, if he had noticed her he would have gone after her and that would have diverged from the book too much. Victoria’s purpose at the prom was simply to leave a cliffhanger for the next movie (though it does cause some factual mistakes).
•Revealing mistakes: In the scene with Edward and Bella lying in the grass, you can see Edward’s carotid pulsating. In the ‘Twilight’ books, vampires do have hearts, but they do not beat.
•Incorrectly regarded as goofs: After Bella is out of the hospital she still wears a leg brace when she is heading to prom. But she doesn’t have any bandage or mark on her right arm from when she was bitten. However, the venom that changes human to vampire heals the body in that process, thus also the skin. There might be a scar, but the wound would certainly be healed well enough for Bella to go without bandages.
•Continuity: In the ballet studio when James breaks Bella’s leg, it looks broken, but at a far away shot, she is holding her leg, and it does not look broken. Later, after Edward falls and she slides away, she moves both of her legs. If it was broken, she would be in too much pain to move it.
•Revealing mistakes: Throughout the film, various vampire’s ears and necks are not paled out, only their faces. Especially in one of the cafeteria scenes, Robert Pattinson’s ears are extremely red.
•Boom mic visible: In scene where Charlie brings the truck back with new tires. The boom mike is visible in the reflection on the front fender of the truck.
•Continuity: In the beginning when Charlie is driving Bella to the house he has his windshield wipers on and its not even raining.
•Continuity: In one of the scenes with Edward’s car, when his car approaches, he has Oregon license plates. As he spins the car around and drives off, the plates appear to be Washington plates.
•Continuity: While at prom dancing under the gazebo, two couples exit to give Edward and Bella privacy. When the camera cuts to a different view, you can see the second couple leaving again.
•Continuity: In the scene where Bella and her friends go down to La Push, Bella, Jacob and his friends all have candy in their hand but in the next scene it’s gone, and then it’s back again.
•Incorrectly regarded as goofs: When Jacob confronts Bella at the prom scene she is shown in just her dress. A couple of shots later when Edward cuts in, she has a sweater on. If you watch Edward closely, though, you see him holding her sweater and then he drapes it over her shoulders before turning away from Jacob.
•Crew or equipment visible: When Edward is telling Bella “you better hold on tight, spider monkey” you can see his harness pulling his shirt up.
•Errors in geography: When the girls are in the dress shop you can see two flags in front of the building across the street. One is the American flag and the other is the state flag – it’s Blue with a Yellow symbol. This is Oregon’s flag not Washington’s. Washington’s flag is green with a black and white symbol of George Washington.
•Continuity: When Bella first sits next to Edward in biology and he visibly recoils, there are two samples on their shared desk. Edward nudges one towards her and pulls the other towards himself, but in the next shot, they’re back next to each other in the center of the desk.
•Continuity: In the meadow scene, Edward and Bella are lying very closely together at first, but when the camera angle switches, they are suddenly quite a bit farther apart even though they should have been in the same positions.
•Crew or equipment visible: When Bella first arrives in Forks, she and her father are in the car on their way to the house. In a medium shot you can visibly see a small camera on the windscreen wiper on the left hand side.
•Factual errors: In the scene in the cafeteria with the background of flags, the Kenyan flag (the green, red and black one with a shield) is hung upside down, the black stripe should be the topmost.
•Revealing mistakes: Throughout the movie you can see the vampires’ breath. In the book Edward states they can breathe because it enhances their ability to smell and helps them blend in as ‘normal’, but you would not be able to physically see their breath because they have no actual body warmth.
•Revealing mistakes: When Dr. Cullen is treating Bella in the E.R., the x-ray on the view box behind him is wrong (upper left x-ray). It is an x-ray of the spine of the upper back and it is upside down.
•Revealing mistakes: In the end, when Bella is in the hospital for the second time, Edward leaves lip marks on Bella’s forehead when he kisses her. This is probably due to the makeup, including lipstick, Robert Pattinson is wearing to match the vampires pale complexion.
•Revealing mistakes: In the last close-up of the movie, Edward’s face is close to Bella’s and it is extremely noticeable that his skin is at least 5 shades darker than hers. Vampires are supposed to be the palest of pale.
•Crew or equipment visible: When Bella is in her bedroom and wearing a green shirt, she lifts her arms up for a second to do something and you can clearly see her audio wire on her side under her shirt.
•Incorrectly regarded as goofs: In a scene in the lunch room, Emmett is clearly seen chewing on food. It has been stated time and time again in the books that vampires do not eat, and their food always remained untouched during lunch. (Indeed, Stephenie Meyer mentions on her website that they kept having to redo those scenes because Emmett kept eating.) However, in the book, Edward does mention that he can indeed eat human food, he just doesn’t like the taste of it. He compares this to how humans eat food they don’t like, but pretend to. This could explain why Emmett was “eating” during that scene.
•Continuity: When Edward is lying next to Bella on her bed, moonlight (sunlight reflected off the moon) is coming in through her window and hitting his face, chest, and hand, but they are not sparkling.
•Continuity: When Bella is in the ballet studio, she smacks her head against the wall and begins to bleed; however, when she’s shown in the hospital, her head is not bandaged.
•Continuity: When Alice pitches to both Rosalie (for the 2nd time) & Jasper in the baseball scene, the runner is running from second base before she even throws the ball. Then after both have hit the ball, the runner is seen again just leaving second base.
•Factual errors: In the scene in the cafeteria with the background of flags, the last flag behind Edward is an old Yugoslav flag – the red, white and blue with a red star. The country and the flag do not exist anymore. Furthermore, the Yugoslav flag was blue-white-red; and the red-white-blue was of ex Social Republic of Croatia (republic within Yugoslavia).
•Continuity: There are several cases where Robert Pattinson’s American accent seems to slip into the actor’s native British accent.
•Revealing mistakes: In the scene where Edward is driving Bella to his house to escape from the Tracker (James), he jumps in the bed of the truck and opens the door to climb inside. When he does, you can clearly see it’s his stunt double.
•Incorrectly regarded as goofs: When Edward and Bella are in the car and she says she’s warm enough they both go to touch the button, but you can see an early reaction on Edward pulling himself back a bit before they even show him pulling his hand away. However, in Midnight Sun, when he is about to touch her face for the first time, he pulls away suddenly, thinking that his cold skin might repel her. Given that this was the first time they touched in the movie, his pulling away could actually show his reluctance and his fear that Bella would leave him. (info recieved from http://twilighters.org)