Continuity: Color of Alicia's underwear as she walks out of the bathroom.
Continuity: In the TV version, when they changed all instances of Darian's name to Adrian, they forgot one part. At the end, Nick is going through the dozens of letters she has sent him. The return addresses say Darian, or D. Forrester, etc. (see trivia)
Audio/visual unsynchronized: When Darien is playing the piano at the party, her hand movements are not consistent with the piece that is being played.
Continuity: On walking into the bedroom from the bathroom, Adrian is wearing underwear, but when she removes her gown (viewed from the closet), it has disappeared.
Continuity: When Nick looks out at Darian swinging, he's wearing a dark checkered shirt, then when he goes out to talk to her, his shirt changes to striped.
Continuity: When Darian hits Cliff over the back with the attic pole, the brass hook disappears between strikes.
Audio/visual unsynchronized: When Amy goes to her car after her night with Nick, she meets and talks to Adrian. On the DVD version, right before Amy says, "Let me explain something to you," Amy's voice is heard saying, "Adrian," but Amy's mouth clearly does not move.
Revealing mistakes: When Adrian and Nick are fighting by the stairs at the end of the movie, the wooden pole that Adrian is swinging bends.
Revealing mistakes: Obvious stunt double when Adrian and Nick are fighting by the stairs.
Errors made by characters (possibly deliberate errors by the filmmakers): Early in the film, while talking about Nick's writing, Adrian notes, "You have such a terrible time with the objective case." Later, Adrian has her own trouble with the objective case when she says, "I think it's brought Nick and I a lot closer." She should have said, "I think it's brought Nick and me a lot closer."
Crew or equipment visible: When Cheyenne is coming up the stairs to talk to Nick about Adrienne, you can see the shadow of the square corner of the camera moving up the steps on the right side in the moonlight.
Continuity: When Amy comes out to her Jeep after her night with Nick, the windows are all rolled up, or closed. When she's done talking to Adrian/Darian, they somehow have already been rolled down, as she opens the door by putting her hand through the frame where the window should have been, and sticks her head out without ever rolling the windows down from inside.
Continuity: When Adrienne is leaning into the bathroom talking to Nick, her hands are not on the door frame. In the next shot, her left hand is on the door frame.
Continuity: When Amy goes to her car after her night with Nick, she meets and talks to Adrian, as they talk, Amy has one leg cocked up holing her purse while searching for her keys. As the scenes switch back and forth between Amy and Adrian, Amy's cocked leg switches from right to left and back.