Continuity mistake: As Nicholas Cage is smoking a cigarette in his car when his daughter comes into view for the 1st time. The camera angle flips between him, him with her in the background, to his key, back to him, and back to him with her in the background. Each time the angle changes so does the length of his cigarette. The time span is only a matter of 10-15 secs as she walks up and then starts to walk away, but his cigarette ends up being longer than when she walked up.
Other mistake: As Roy meets his daughter, he gets out of his car and we see the car door left open as he runs towards her. Near the end of their conversation, the camera focuses on Roy, and through the space between his body and right arm, you can see the side view mirror indicating the door is now shut without anyone touching it.
Continuity mistake: In the scene where Angela and Roy are bowling, Angela rolls her ball down lane 23. When Roy takes a turn bowling a second later, he throws his ball in the gutter in lane 26.
Continuity mistake: In the scene where Nicholas Cage fixes his daughter spaghetti, she grabs a beer and the foam fills the neck. Then the shot goes behind her and the foam half-fills the neck, then from the front again the neck is full.
Revealing mistake: Throughout the film when we see wads of £50 notes they are quite fake as the print of the queen looks far too dark and the colours are off. Surely it wouldn't have been too much bother to put one real note on top of each wad?