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.
Visible crew/equipment: Towards the end of the movie when Whitney Houston is in her hotel room with Kevin Costner you can see the mic in a reflection in the window of the suite.
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.
Factual error: When Whitney Houston turns up at the Oscars, it's night time. In reality, guests to the Academy Awards always arrive in the afternoon.
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: The bar scene of Rachel's and Frank's date contains a lot of editing flaws: 1) Rachels position switches between both arms down and chin rested in hand, 2) in one shot from the back we see her lifting her glass to her mouth, but when the camera angle changes she's not drinking, 3) the way Frank holds his glass switches between full hand and thumb plus two fingers, 4) Rachel's bangs change between straggly and fluffy.
Visible crew/equipment: Towards the end of the fight in Frank's kitchen, when Tony pulls the knife out of the holder, look at the bottom right side of the glass front of the cupboard in front of a pile of plates: There is a beautiful reflection of a crew member in a white shirt giving signs with his arm.