Continuity mistake: In the scene when De Niro kicks down Waingrow's hotel door, on the police TV you see the sign on the door handle fall off. However when De Niro enters and hits Waingro in the face, the sign is back on the handle. (02:33:50)
Continuity mistake: In the armoured car robbery, when the explosive charge is fired, the windshields of the row of nearby cars all explode outward toward the blast instead of inward away from the blast.
Continuity mistake: The armored car robbery takes place in the early morning. Waingrow pulling on his clothes, the light in the sky all say early day. By the time Pacino arrives to survey the scene it's pitch black and all the bodies are still on the ground.
Continuity mistake: During the shootout scene, De Niro is in the passenger seat of the getaway car and attempts to shoot out the windshield. He empties half the magazine from his automatic AR-15, yet when the camera changes to a front view, there are only 4 bullet holes in the windshield. (01:48:19)
Continuity mistake: During the scene in Edie's house in which Neil first asks Edie to go away with him 'somewhere', when the camera shot faces Neil he is shown wearing only his white shirt. When the shot changes to the camera facing Edie over Neil's shoulder, we see the dark border of Neil's suit jacket in the lower corner of the screen. This continues throughout the scene, as the shots repeat back and forth with Neil in white shirt only as he faces the camera and wearing his jacket as he has his back to the camera.
Continuity mistake: When Cheritto leaves the bank, he walks up to a Lincoln Town Car, which is a 4-door car. A very brief shot shows him opening the front door. The camera cuts to a side view and suddenly the back door is open. The camera cut too quickly for him to change his mind, shut the front door and get in the back seat. (01:46:00)
Continuity mistake: When Neil and Eady meet in the cafeteria, Eady is drinking from a glass. The position of her hand holding the glass switches mid-sentence when the camera angle changes. (00:26:30)
Continuity mistake: In the bank robbing scene, they enter on the street level and since no elevators or stairs are used by them the bank must be on that same level. However, looking out of the windows during the scene it appears they are on an upper floor in the building.