Continuity mistake: When Belinda says "nice sweater" to Jamie, Jamie has a backpack on. When Jamie walks away, her backpack disappears. (00:11:55)
Audio problem: When Jamie is looking through the telescope Landon built for her, the second time she says, "Come here. Come look. Quick," is looped because her lips are hardly moving. (01:31:25)
Continuity mistake: When Landon goes to visit Clay in the rehab center, as he's walking in it's a bright sunny day. But once he enters the room, the weather through the window is dark and dreary. (00:35:05)
Other mistake: During the play where Sally walks out on Landon's character in the club, you can see Mandy eyeing Shane and smiling under her hood as if they weren't filming anymore. (00:37:10)
Other mistake: When Landon tells Jamie "In your dreams", as he and his friends are walking off, Landon and his ex-girlfriend are walking arm in arm to class. This is after Belinda invites Landon into her house and he tells her that its over. In the commentary with the actors and director, Shane West says that he and Lauren German thought the cameras were off. (00:30:10)
Continuity mistake: After the first tutoring session as the students are going home on the bus, you can see the bus is driving in a residential neighborhood. After Jamie walks away from Landon, you can see the bus from an aerial view with trees on both sides and not a house in sight. (00:16:05 - 00:18:15)
Other mistake: During the scene when Jamie is humiliated in the cafeteria with the flyers, the flyer that Landon holds up has a girl with a bathing suit and Jamie's head. But the flyers on the table show the girl completely naked with Jamie's head on it. On the DVD commentary with Shane West, Mandy Moore, and the director, they say that they had to CG a bikini on the one picture because of the rating of the movie.
Other mistake: On Landon and Jamie's first date, they are dancing. When the camera backs away and is going to go onto the next scene, you can see that Landon and Jamie are standing there, barely moving, and laughing. Mandy Moore confirmed later that they were wondering whether the scene was over or not and wondering whether they could stop dancing.
Continuity mistake: When Landon and Jamie are looking at the stars together, and he tells her he had a star named for her. A couple of seconds later she takes the paper showing the coordinates of the star and starts to sit down. The camera angle changes and shows her still in motion to sit down, but now the paper is nowhere to be seen.
Continuity mistake: When Jamie goes to the graveyard, Landon gets out of the car to catch up to her. When he catches her by surprise, her ponytail stays behind her back. When they show her again, Jamie's ponytail is draped over her shoulders. When they show her one final time, it's behind her back again.
Revealing mistake: The makeup artists tried to make Mandy Moore (Jamie) paler for the movie, but they neglected everything but her face. In the star registry scene, notice how tan Jamie's legs are compared to her face. In the scene where she is sleeping on Landon's shoulder, you can see how tan her shoulder is compared to her face where as Landon pulls her sweater back over her shoulder. (01:04:00 - 01:18:40)
Continuity mistake: When Jamie is singing in the play, her hair is down and goes from all/most of it over her shoulder to all behind her shoulders. This switches on and off.
Continuity mistake: When Landon drives Belinda home, his scar on his forehead is gone, but the next shot when he is waking up, it's there.
Continuity mistake: At the beginning when the kids go to the plant to jump into the water, as they walk away from the cars, the lights on the Camaro are on. When they run back, they are off.
Continuity mistake: Landon looks for Jamie and finds her at the cafeteria reading a book. He says, "Jamie, I'm trying really hard here", she then gets up and walks away towards the door, notice that her shoes are black. Immediately after that he follows her outside and catches her walking out the main door, her shoes are now white. (00:45:05)
Continuity mistake: The day after Landon and Jamie are practicing for the play, Landon meets up with his friends and is questioned, "Is everything okay?" Notice the outfits everyone in the group is wearing. Each person is wearing the very same clothes that are worn weeks later, when they are making the poster of Jamie. Though people realistically wear outfits over and over, here each person wears the same outfit on the same day.
Continuity mistake: In the scene after the play when Landon's father tries to talk to him, a man walks past them in a green shirt. In the next shot, the same man walks down the stairs behind Landon and his dad in the same green shirt.
Continuity mistake: When Belinda comes to Landon's house to give him the pictures from the school play, her hair is in a ponytail. From the back all her hair is in the ponytail, but when they show her talking from the front, you see a piece of her hair hanging down. They switch back and forth between the front and back shots, so it's easy to catch.