Corrected entry: When the final fight on the derelict porch is over and the camera pans back from hanging over the cliff onto the porch, there is a discrepancy between the real house wall and the CG part of the scene. If you look carefully, you can see that two parts of the wall behind the two characters on the screen slide "out of place" as if they were shot from different angles.
Corrected entry: In the classroom scene where the students are taking a pop quiz, the teacher is pacing at the front of the room, about one or two metres from his desk as they all hand their papers to the front. A split second later, the camera cuts to a close shot of the teacher sitting at his desk and holding his glasses. There is no way he could have moved behind the desk and sat down that fast.
Corrected entry: When Cassie and her partner are in her houseboat, Cassie's robe is loosely open in the first shot, but tightly closed up to her neck line with the following camera shot, before she leaves to sit on the dock.
Corrected entry: When Cassie is in her boat house, her partner walks in and doesn't close the sliding door, but when he walks out he opens the door.
Corrected entry: At the beginning of the film we see Sandra Bullock arrive at the crime scene, she is wearing a black turtle-neck type shirt under her jacket. The next scene we see her in is when she arrives at her boathouse with Ben's character, presumably coming from the crime scene, only now her turtle-neck is blue, and Ben's clothes are different as well.
Corrected entry: When Justin leaves Lisa's apartment after admiting that they killed Olivia, Lisa picks up the phone to call Cassie. She dials the phone number very quickly as if she had known it by heart. There is no way she could have memorized Cassie's cell phone number without looking it up.
Corrected entry: When Cassie and her partner are questioning Richard in the gym he says, "Wow, I thought I was in trouble or something, but you really did find my shoes?" Yet when Richard is playing the recording back to Justin it plays back as Richard saying, "You found my shoes?" The recording left out the first sentence of his line.
Corrected entry: In the scene where the detectives are searching the dead girl's house, one of the crime lab techs inadvertently knocks over the stereo remote, causing the stereo to turn on. The problem is, the remote fell behind the stereo and being an infrared remote, it could not have caused the stereo to turn on. The only way the stereo could come on is if the infrared remote was pointed at the infrared sensor on the receiver on the front of the stereo.