Factual error: Outside the Oscars, the camera pans around to show the crowds and the security guards on the surrounding rooftops. One is holding a rifle which he should be, however there is another guard standing next to him overlooking the crowd holding a shotgun. This makes no sense at all, if he were to ever use that weapon from his position he would hit dozens of people.
Continuity mistake: When Frank's dad is cutting mushrooms while cooking dinner, he slices a mushroom in a closeup. In the next shot, the mushroom is whole again.
Visible crew/equipment: When Frank comes back to the hotel room after the beating in the hotel kitchen Delaney informs him that Rachel had received another call from the stalker. In the scene there is a reflection of the mike in the window, and we even see how it's turned around when the take is over.
Continuity mistake: In the scene where Frank puts Rachel to bed. He moves some dolls aside by pushing them, and the dolls fall over. In the following shot, where Rachel is in bed, one of the dolls is sat up straight.
Continuity mistake: When Frank is in the pool house watching Rachel's music video, one minute he is leaning forward in his chair to watch it, and the next you see him sat back in the chair and then he starts to lean forward.