Continuity mistake: As Dalton stands inside the bank vault staring at the cash, the scene jumps from a wide, distant shot, to medium, to close-in, just outside the cage. Another robber stands just outside and between jumps his gun position shifts from relaxed to raised to relaxed again.
Continuity mistake: After the Detective wrestles with Dalton, and he pulls his revolver out, and he cocks it and says "you just crossed the fucking line", the next shot shows the revolver is not cocked.
Continuity mistake: Near the end, when Jodie Foster barges in to see Christopher Plummer at the barber, she has a tote bag. She sits in an empty barber chair and places the bag on the floor before speaking to Plummer. As she rises to leave, she picks up the bag, but when the shot cuts to her just as she walked out the door, she is no longer carrying it. Both hands are clearly visible as she buttons her jacket, and the bag is not in either hand, nor is it slung over her wrist or arm. It is simply not there. This particular shot may only be visible in the theatrical and widescreen DVD versions, and not in an edited and "pan and scan" format.