
Other mistake: When we see the "regulators" riding over the hill on the way to kill Django and Schultz, if you look carefully at the right-center portion of screen, you can see one of the stuntmen fall off his horse and the horse continues to run down the hill without him. To make matters even worse, it appears the stuntman rolls right in front of another horse and gets trampled. (00:41:00)
Spencer Crouse

Other mistake: The film is about a gang of Confederate soldiers after the Civil War, so a black man in the gang would seem a bit out of place.

Other mistake: During the final shootout in the saloon, young Joey yells, "Shane, look out!" Alan Ladd whirls around and his gun goes off. But the gun isn't pointed anywhere near the bad guy who is standing on the second floor balcony. Shane more than likely shot the furnace that was off to the right. Yet, the bad guy still manages to do a face plant on the barroom floor.
SoCalRuss
Other mistake: At the beginning when the lawman is cutting down Eastwood from tree in the background you can see a white vehicle driving along a road in the background.

Other mistake: In the very last scene of the movie, and just before Blondie shoots the rope that is holding Tuco on the grave's cross. You can see a car moving in the background, screen right of Tuco's head.

Other mistake: There is a patch on the jacket Harley (Rourke) wears, that appears and disappears throughout the movie. It's on the front lower right side. It is there when he's standing outside their friends' bar with Marlboro, it's gone when they are inside.

Other mistake: The protected copy of the Bible is placed at the end next to a copy of the Artscroll Tanach which includes the Hebrew/English version of the original bible as well as the other 39 holy books, so they had it all the time.
Suggested correction: The Tanakh, as much as it is the "Hebrew bible", does not include the entirety of the new testament, which, as well as there being numerous changes between the Tanakh and the KJV, means that no, they did not "already have" what Eli was bringing to them.

Other mistake: There is a scene where a dead Indian warrior is discovered. In this scene he is covered by a large flat piece of stone. When they pull away the stone you can see his chest rising and falling as the "dead" Indian breathes. Much easier to see when viewed in HD.

Other mistake: In the Todd-OA version, just before the song "Oklahoma." Gordon MacCrae puts his hand on the porch post and the post moves off the rail. He then pulls it back.

Other mistake: Near the end of the film there is a stand-off, if you look in the sky an aeroplane flies by.

Other mistake: When John Wayne is running about near the chapel with a torch, inside the chapel, you can see a lot of Mexican soldiers just standing there not doing anything.
Suggested correction: Soldiers sometimes find a spot of relative safety and stay there...it's human instinct to stay safe.
Steve Kozak
Other mistake: When the Earp Brothers first arrive at Tombstone Fred White is telling them about the Cowboys and says "there's three of them now," the camera then shows four people wearing the red sash of the Cowboys.

Other mistake: When Marty returns to 1985 from 1885 the time machine is destroyed by a train. What is strange is that not only does the train not stop (which is mandatory in the event of an accident) but there is also no reaction from people nearby, such as those in the vehicles waiting to cross the track at the level crossing. Later, when Marty returns to the site with Jennifer, there is still no sign of police officers or other officials.

Other mistake: Bandoleer rounds don't fit any weapon in the show. When Pierce tries the Gatling gun, there is no magazine in it.

Other mistake: There's a horse that has apparently ridden up a cliff, and an electrical burning brand that can be changed onto different flame settings.

Other mistake: Right before Bret meets Annabelle on the Lauren Belle (before the big game) the drummer in the band (he's on the far right) is just moving his drumsticks up and down, there's no drum set in front of him but you can hear the drums in the music being played. (01:18:57)
MCKD
Other mistake: At the very end, when a man is painting the "F" of the city's new name on the water tower, with white paint, you can see that though the brush is white, and it is touching the surface of the water tower, no paint is left on the surface of the water tower. Nevertheless, the painter continues painting the letter in the next shot, even though no paint is left on the surface. (01:36:00)

Other mistake: When Kirk Douglas 'appears' to pull a knife from his collar and throw it into Lee Van Cleef's chest, you can see Kirk pick the knife up from a trough in the front edge of the bar. The knife is already in his hand when he reaches to pull the knife from his collar.

Other mistake: When they are in San Francisco, notice the pianist. The keys he presses don't correspond with the notes he's supposedly playing. It's a little bit obvious that the music was recorded in advance.

Other mistake: In the final gun battle when the Regulators are trapped in the attic of the burning house, one of the characters backs into the brick chimney that's coming up through the floor. You can see the entire chimney move when he backs into it.