Continuity mistake: When Sean Penn enters his apartment for the first time the light switch is on, then after a cut away the light switch is off. (00:30:20)
Continuity mistake: In the scene where Nicole Kidman and Sean Penn are talking for the first time in the lounge area, Nicole's bangs go from across her eye to swept aside from shot to shot.
Continuity mistake: During the apartment scene when Sean Penn is standing by the door telling Nicole Kidman about his wife, the collar of her white shirt goes from straight to up and back again.
Continuity mistake: Nicole Kidman's hair changes between shots in the scene where Sean Penn first interviews her. In some shots, her hair is in front of her eye, in other shots her hair is away from her eye. There is no time between shots for her to move her hair out of the way.
Continuity mistake: The blood smear (following Sean Penn's ministrations) on Nicole Kidman's face changes considerably between two close-up shots. There was no additional contact from Penn and it is before she rests her head on his shoulder.
Continuity mistake: Towards the end of the movie, in the scene when Kidman is telling Penn that she "is going home", throughout the scene her hair changes from staying behind her ear when the camera is behind her, to blowing behind her ear when the camera is on her face.
Continuity mistake: Towards the end of the movie after Sean Penn reads Philippe's suicide note to Nicole Kidman he puts the letter in his right hand and reaches for the bag with his left. In the next scene he has the bag in his right hand and the letter in his left hand.
Continuity mistake: The music played in the bar scene when Sean Penn calls home is not the same when he goes home and listens to his answering machine.
Chosen answer: At this point, she has set her mind on killing the African leader and knows she'll likely be killed immediately afterwards (police, bodyguards, etc). She's writing her name in anticipation of her death.