When Beaudray Demerille (Peter Fonda) climbs down the rope to enter the cave with the gold, as the camera watches from his left side he pulls a flashlight out of his belt with his left hand (Fonda is left-handed) and aims it into the cave and starts to take his first step toward the cave, then in the next shot from inside the cave looking at him head-on as he is taking his first step toward the cave, the flashlight has switched to his right hand.
As the gun battle between Beaudray Demerille (Peter Fonda)/Wanda Nevada (Brooke Shields) and the two bad guys winds down, Beaudray pulls a sawed off shotgun and fires it in the air, then the camera cuts to the two bad guys and the shot hits the ground just beside the one on the right.
When Wanda and Beaudray arrive at the bottom of the Grand Canyon, Wanda sits down on a chair beside the blockhouse and is totally in the shadow of the roof. Moments later, she is mostly sitting in the sun while the chair is unmoved.
In the shot before they meet the "old prospector," Bo, Wanda and their mules are making their way down a boulder strewn path in the canyon. One of the mules bumps a boulder with its pack causing the boulder to slide to the left revealing that it is a light-weight fiberglass fake, rather than a solid rock.
In the official trailer Brooke Shields has been credited as "Brook Shields".