Character mistake: After Reed proposes to his girlfriend, he calls Julia and leaves an excited voicemail telling her he has huge news. When Julia listens to what is supposed to be the same voicemail, the wording and tone are completely different, leading Julia to think something was wrong, such as his girlfriend declining the proposal.
Character mistake: In the scene where Stewart calls Nicole at the end of the movie, he tells her that he got a horse shot in the leg, when in fact they showed him getting the shot in his neck.