When Ray Ray, the solicitor, is in the shop, he gives Ricky a phone which a few moments later, he is seen taking it back. However, as Calvin enters and chases him out, Ricky is seen again with that same phone, trying to give it to Isaac who was standing behind him.
When J.D. and Billy are carrying the machine to the motel room, Billy sees another man and lets go. The machine then falls on JD's foot, visibly above his ankle, yet, when they are in the room and JD removes his sock, the wound "moves" from above his ankle to the side of his foot under the big toe.
Just before Eddie is about to defame the name of Jesse Jackson, the mailman in the scene is seen wearing his post office issued hat. As the scene cuts to Checker Fred and then back to Eddie, you see the mailman place his hat on his head and leave out of the Barbershop.
When Eddie is about to show the philosophy of shaving, he covers the customer's face with the towel twice.
Several references are made to Ricky serving a long prison sentence due to the three-strikes law. Illinois is not among the states that have three-strike related laws.
When Calvin is driving Ricky, after Ricky throws the gun in the river, he makes a left turn. His hands move and the background scenery changes accordingly, but he only slides his hand over the steering wheel, which stays still.
The "broken" lamp is off/on between shots after Billy hits it with the axe.
While Calvin is setting up the studio equipment in his basement, Jennifer's shadow can be seen as she waits at the bottom of the stairs for her cue.