Factual error: In the scene where Roxie is placed in the "paddy wagon" to be taken to Cook County Jail, the prosecutor refers to himself as District Attorney Harrison. However, the court system in Illinois doesn't have district attorneys; rather, they have state's attorneys. The original play by Maureen Watkins correctly calls him a state's attorney.
Factual error: After Berry and one of the Country Bears get in the bus to find the others, they show a scene with the bus going along a road and Berry leans out the window. Here you can see the side of the bus is spick 'n' span clean. Then, later, the bus is as dirty as it was when it left the shack, very noticeable at the start of the carwash scene.
Factual error: After the VW van hits the tree stump, steam is coming from the front of the vehicle. Those vehicles have the engine in the rear. (00:05:53)
Factual error: At the end of the movie, when Burke faces Sheldon, he tells him "one of the secrets about owning a gun: You have to cock it." But since Sheldon's weapon was a double-action revolver he doesn't have to cock it. He could just pull the trigger.