Continuity mistake: Before the Ghoul Gang leaves the Portuguese ship, Amsterdam throws the captain's body into the boat. It lands more or less under the seat, but in the next shot the body is placed right at the bow. (00:38:35)
Continuity mistake: The scene where Amsterdam is climbing on the Portuguese ship, we see that there are still four people left in the small boat and we see that Johnny is the first one on the ship, so how did the rest of the gang board the ship before Johnny and Amsterdam? They even know that the ship has been ransacked. (00:39:05)
Suggested correction: There was no scene that shows Johnny was first one on the ship. There was a scene where he climbs before Amsterdam who was the last on the ladder, and all the gang at that moment was already onboard, because they climbed there offscreen.
Continuity mistake: After Jenny knees Amsterdam a second time, he grabs her by the throat but when the camera angle changes his hands are now at his sides. (00:40:05)
Continuity mistake: When Amsterdam comes to Bill's place for the first time there is a little altar with priest Vallon's picture. It has an inscription saying 'In Memory of Priest Vallon, 1846'. When he comes the second time and has his fist fight with McGloin the picture falls on the ground. When Bill put's it back on its place the inscription isn't there. (00:42:50)
Continuity mistake: When Amsterdam meets Jenny for the second time he is seen stealing what looks like an apple and is in his right hand. When she runs away he doesn't have the apple, but when the when the shot is on Amsterdam the apple reappears for him to throw it to the ground. (00:45:30)
Continuity mistake: The amount and position of the blood on Amsterdam's neck changes during the first fight with Jenny after he discovers she's a turtledove. (00:49:05)
Factual error: In the funeral procession scene, the priest is wearing the maniple on the wrong arm. The maniple is a 2 ft strip of ornate cloth prescribed for use in the Catholic Mass before Vatican II in the early 1960s. It is actually worn of the left forearm; however, in this scene it is on the priest's right. (00:49:10)
Continuity mistake: Jenny pokes Amsterdam with her knife on the right side of the neck as he is trying to retrieve his medallion from her. Shortly afterwards, while walking back with her, he is seen dabbing the left side of his neck in two different shots, one of them pretty lengthy. (00:50:00)
Continuity mistake: When Amsterdam just met up with Jenny after she stole from the house, he is holding a handkerchief to his neck were he was cut. Then the camera view changes and his arm isn't there and it was too quick for him to move his arm. (00:50:20)
Continuity mistake: When Amsterdam is walking through the streets for the second time with Bill, Monk knocks Amsterdam's hat up so he can see his face. When he hits it up, the hat goes up on Amsterdam's face. Then they show Bill, then Amsterdam again, and the hat is back down shading his eyes. After a shot of Monk, they show Amsterdam again, and the hat is back up away from his eyes. (00:53:30)
Revealing mistake: When Jenny gets mugged at the docks, a thug hits her in the stomach with a large wooden club. The club is obviously rubber, as it bends almost ninety degrees after hitting Jenny. (00:58:20)
Continuity mistake: When Jenny rubs her fingers over the old scars on Amsterdam's chest, you can see light under the tips of the scars as if they peeled up. (01:05:50)
Continuity mistake: During the first quasi love scene between Amsterdam and Jenny (after the dance) there is a shot where they begin to kiss, and they are at about the same height, right next to each other. In the next shot, Amsterdam pulls away, and you can see that she was laying back, and he was leaning over her, kissing - a completely different position. (01:07:05)
Factual error: In a scene set in 1862 or 1863 Bill the Butcher says: 'An Irishman will do for a nickel what a ****** will do for a dime or a white man for a quarter'. The first nickel 5 cent piece was coined in 1866. At the time of the scene the 5 cent coin was a small silver coin called a half-dime. (01:10:00)
Revealing mistake: When Bill gets shot at the theater blood gushes in quantities that could only come from a main artery. His obvious fitness in the following sequences speaks against it, though. (01:13:40)
Continuity mistake: When Amsterdam jumps at the killer to protect Bill, the way he takes off to the right and the way he grabs the hand with the gun coming from the left side don't fit. (01:13:40)
Factual error: When Amsterdam kills the man that shot Bill the Butcher in the shoulder at the theater, you can see bananas on the floor. Bananas were traded in the U.S. only after the Civil War. (01:13:50)
Continuity mistake: When Bill gets shot, he is standing above the man who shot him and depending on the camera angle, the blood spot on his left arm changes size and location. Happens about 4 times during the scene. (01:14:45)
Continuity mistake: After saving Bill, Amsterdam makes a toast and puts his hand on his chest. Camera angle changes and his hand is by his side. (01:19:55)
Continuity mistake: After the party following Bill's attempted murder Jenny walks up the stairs. Amsterdam runs after her immediately to confront her, and when he storms into her room she is in the middle of cleaning Bill's blood-stained clothes. Besides, there's no water in the bowl. (01:20:30)
