The stage robberies are all staged with the bandits chasing after the stage at a full gallop exposing themselves to fire from the stagecoach shotgun rider. Holdups were more safely undertaken by surprising the stagecoach and stopping it from a frontal ambush.
When Ed Landers turned around to shoot uphill at James Wylie who was coming in behind him, his gun went off before he was turned halfway around, when it was still pointed at the ground.
When Wylie is showing off in the stagecoach by making a deck of cards fly between his hands, it's obvious that he's using an accordion deck and not a real deck of cards.
After the stage leaves Cheyenne at night, the darkened view of Cheyenne in the distance is the same as the distant view of Laramie used early in the film.
In a few shots during the stage coach chases, there are tracks on the ground obviously made by pneumatic tires, not wagon wheels.
During the second stagecoach robbery, the second member of the gang to be shot grabs his chest before the gunshot is heard.
When Ann Kincaid first goes into the Wells Fargo office and talks to Ed Landers, one view from behind Ann from the right side as she is talking, it is obvious that her mouth is not moving as the dialog continues.
At the very end of the movie after Ann gets into the stagecoach to leave, her lips move as she seems to be saying something to the driver, but no sound is heard.
This movie was shot in the dry desert areas in Arizona which look nothing like the green landscape in Wyoming.
When Ann is telling Wylie to get out of the bathtub, a shadow of the boom microphone can be seen to dip down onto, then move off of the room partition between them.