Continuity mistake: A few minutes after James accidentally shoots his friend, he reloads his shotgun and tells Kristen that he is going outside to look around, and tells her to stay put. He walks to the front door and as he passes the clock on the back wall, it reads 5:00 a.m. A few minutes later, Kristen walks past the same clock, and it reads 4:30 a.m.
Continuity mistake: James takes off his tie to cover the cut on Kristen's hand, but when they run outside to escape in the car James is wearing his tie again, then after the failed escape they run back inside the house and James tie is missing. In another scene Kristen goes into the woods to look for James and falls into a ditch, then as she climbs out the tie is missing from her hand, but the next scene it's back in place.
Continuity mistake: When Kristen is discussing the ring with James at the table, there is an ice bucket with a bottle of champagne in it. During their conversation, the ice bucket moves closer to the candles and is empty. Seconds after showing the ice bucket empty near the candles, James gets out of his chair, grabs the champagne from the ice bucket in its original spot, and pops the cork.
Continuity mistake: Throughout the movie, the bandage put on Kristen's hand by James appears and disappears in several different shots.
Continuity mistake: The box which holds the engagement ring that James gives to Kristen is bright blue when he first gives it to her. Later, when he lays it on the dining room table as he is eating ice cream, it is black and when Kristen picks it up later to put it on her finger, the box is black then, too.
Continuity mistake: When the friend accidentally gets shot in the head and they exit the room and pass his body, the right side of his face is clean. Later when she comes back into the house they show the body again, but he now has a very large exit wound on the right side of his face.
Continuity mistake: When Kristen is in the room trying on the ring, you can see the open bottle of champagne on the table. When she goes to play the piano, you can see the bottle not on the table, but in a basket unopened. (00:18:45 - 00:19:15)