Miscellaneous: On some prints, usually the print shown on cable television, R.G. Armstrong is mistakenly listed in opening credits as "R.K. Armstrong."
Factual errors: The locomotive is shown to be a coal-burning type, but has a "diamond" stack of the type used on wood-burning locomotives to trap embers and sparks.
Factual errors: The photographer is shown using flash powder to illuminate the gunfight; since the shootout takes place in bright daylight, this is unnecessary, and wouldn't give enough light to be useful at the distance shown anyway.
Anachronisms: There is a modern fire hydrant on New Orleans sidewalk.
Continuity: When Nobody is trying to hit the fish with a stick in the water, the position of his arms change between the close ups, and the far away shots.
Anachronisms: As Nobody and Jack face off in the New Orleans street - a window air-conditioner (draped with canvas) and what appears to be an electric window fan can be seen on the side of the "Hotel" in the background.
Continuity: When Jack Beauregard and Nobody have their first street showdown, the sunlight and shadows clearly indicate late afternoon. Then Jack looks out in the distance and sees the Wild Bunch riders, who then ride into town. Now suddenly the sun and shadows indicate late morning or mid-day.
Continuity: When Nobody takes off with the train, the last car is a caboose. Yet just a while later when the train comes to the aid of Jack Beauregard, there is a flat-car attached behind the caboose.
Revealing mistakes: The "gold" bars being loaded into the train are obviously fake slugs of undetermined material. You can clearly see the brush strokes of the gold paint that was used to create the illusion of a gold bar.