In the diner where waiter tries to poison the banana split, in some shots Francine has red lipstick on her teeth and in others she doesn't.
Towards the end of the film Bumpy is standing in the pouring rain and is very wet. He crosses the road and goes into a church but when seen inside he's dry.
An on-screen title card reads "December, 1934", and an exterior shot shows a building with green grass surrounding it, and the sun shining brightly. In New York in December, the ground should be covered with snow. In the following scene, Dutch Schultz is having a meeting while a Yankees game is playing on the radio in the background. A baseball game wouldn't be in December!
Charles Lucky Luciano pronounced his name: Lucy-ano. And that's how everyone pronounced it. It is not pronounced Luchi-ano (closer to the correct Italian pronunciation) as in this film.
The real Pigfoot Mary's death is listed as her passing away in 1929 but yet the film is set in 1934..
The film is set in the Great Depression of 1934 when almost all businesses were closed and American citizens were basically penniless from the effect of the stock crash that decade I seriously doubt u would have found people partying and drinking at the Cotton Club during hard times back then as shown in the film..
All throughout the movie people refer to Dutch Schultz as "the Dutchman". Dutch Schultz was of German descent, not Dutch.
When Bumpy is at the ice cream shop with his men and girlfriend he notices rat poison in his ice cream afterward it's found out one of the workers planted the poison then Vallie opens his blade to kill the worker but is stopped once it's confirmed Vallie is the traitor he takes out his blade again to attack the owner who confesses when not less than a minute earlier he had the knife out already..
While attention to detail of historic 1930s United States paper money is present to a point, most of the bills that Luciano looks at near the beginning of the film are from the 1940s as evident by the signatures and designs.
When Dutch has his men bust in the room in attempt to kill Bumpy while he is supposed to be meeting the accountant, one man has a shotgun that was not made during that time period.
Midway through the film, shortly before a series of newspaper headline shots with large 1935 dates are shown, there is an overhead street scene shot with a series of cars parked at the curb. One is a 1939 black Buick which would not have been available for viewing for at least another few years.
Bumpy Johnson was released from prison in 1932, but immediately after his release there are posters for the Joe Louis-Primo Carnera fight of 1935.
While Bumpy and Madame St. Claire are listening to opera on the Victrola, the record playing displays the Okeh label. Okeh Records, founded in 1918 recorded mainly middle-of-the road popular music, standards, light classical and blues, but not opera.
The big gunfight where Madame Queen is nearly killed was not filmed in Harlem, but on S. LaSalle St. in Chicago. Several other shots are not Harlem.
The penitentiary shown in the opening shot of the film is not Sing Sing Prison.