Continuity mistake: In the scene where Christina decides not to be afraid anymore and runs after Peter, she comes out of the house and first shouts while facing in the wrong direction. She knew that he went the other way, because she saw him leave. (Shot at different times, confirmed on DVD commentary.) (01:19:25)
Continuity mistake: When Jane is crying on the couch in the beginning when her friends walk in, the book she is reading about love has no words in it. Only blank pages. (00:05:45)
Revealing mistake: If you look at the instrument gauges right before the foil "bird" hits the windshield, you can see that the car isn't actually moving on its own because the speedometer is at zero. All of the warning lights are on also, meaning the car most likely isn't started at all and the key is just turned forward. (00:32:50)
Continuity mistake: When the water is spraying Courtney in the gas station bathroom, you can see her bra is black. You can also see that Christina is wearing nude-colored underwear, yet when they are getting in the car and removing their wet clothes, Courtney's bra is now pink and Christina's underwear is white.
Continuity mistake: In the wedding scene as the bride and groom are about to take their vows the bride begins to scratch at her neck, she then attempts to blow a bit of hair, that has come loose, out of her eyes. The camera then moves to the vicar and when it moves back to her seconds later her hair is tucked neatly behind her ear.
Factual error: During the wedding scene, the Bride's Family is on the right side facing the alter, in reality, the Bride's Family sits on the left side, the same side the bride stands on. (00:58:20)