Factual error: The Duke Boys drive around in a blue car instead of their General Lee.
Suggested correction: This is a plot point of the storyline, not any kind of a mistake. At the start of this episode, we hear Bo and Luke talking while Rosco is chasing them, and Bo says, "How does he know it's us if it ain't even our car." It's mentioned a few times during this episode, including by narrator, Waylon Jennings. Bo and Luke are driving a "1975 blue Plymouth Fury" as noted by its owner, Cooter Davenport, who was running the moonshine for Boss Hogg.
Other mistake: When the camera is close up on McQuade, you can see the cylinder of his pistol is empty.
Continuity mistake: At the end, when Luke goes to shoot a dynamite arrow into the ground at the car, there is no kind of explosive propellant on the ground. In the close up, there is suddenly a pool of flammable liquid.