Continuity mistake: Cagney and Ward Bond have a shootout while hiding at the opposite ends of the same moving boxcar. Early in the shooting sequence, Bond fires his gun frame right towards Cagney at the far end of the car and the muzzle flash from the blank round incidentally burns the surface of the wooden trim at the corner of the car. It is quite a large distinctive shaped burn, readily visible on the surface of the car occupying the right side of the frame. However the burn is also visible in all of Cagney's camera shots, still on the car in the right side of the frame, now behind Cagney as he fires frame left. Obviously, the two actors were photographed each taking all of their gun-shots in two sequences, using the space between the same two cars, one firing left, the other firing right. No camera move. Minimal lighting change.
Continuity mistake: The opening scene states the date as April 10th 1865, the day of the train station robbery. Siringo tells Vance at the school money-raising event that the robbery took place 8 weeks ago, but when Clint is buried at the end, his death is April 25th 1865, only 2 weeks after the robbery.
Continuity mistake: When Porky tells Daffy to arrest Nasty Canasta, you can see the window next the door has four panes of glass, but when Daffy challenges Canasta to a fight, the number of panes has increased.
Continuity mistake: Britt is using his right hand to (try to) set his pistol atop a rock (per Jed's request), but the rock is pointed and at an angle. When the camera shifts to a side view, Britt is using his left hand to place the pistol on the rocks and the pointed/angled rock is not there. (01:19:49)
Continuity mistake: David Hackett is talking business organizing ranch business while his brother Ed is leaning on the counter, gawking at the beautiful Clee and passing her cloth. He has his right arm up in the close-ups, but the left arm up in the wider shots. (00:04:55)
Continuity mistake: When Stan and Ollie arrive at Brushwood Gulch, they show Mickey Finn the deed they've got for Mary Roberts, and it has a couple of holes in it from where Stan has been keeping it in his shoe; Ollie even unfurls it to show the camera it's got holes. But in every other shot after that, whenever the deed is shown, it's got no holes in it whatsoever and is perfectly clean.
Continuity mistake: The last night before the supposed arrival to Santa Cruz, Boone approaches Mrs. Lane. The moonlight (actually a rather obvious day-by-night) shines on her fully, but as the camera switches to a close-up, suddenly there are all sorts of shadows of foliage over her blouse. (00:57:20)
Continuity mistake: When Cole and the halfbreed duel with knives, the fabric they hold in their mouths as a tether keeps flipping over, meaning the end of the cloth hangs out the left side of the mouth, then the right, and left again - several times for both actors - even tho the fight is continuous and they make no moves that would change this.
Continuity mistake: When Johanna and the Captain are being chased by Mr Almay and his associates, their position in the wagon changes. First Johanna is on the Captain's left. Next shot she is on his right. Next shot she is back on his left. (00:42:14)
Continuity mistake: During the battle with the Indians we see two braves that get killed, both wear distinct costumes that only they have - one brave wears a simple costume consisting of just a breechcloth and single feather. Both braves get shot in the heart and fall off their horses and die at the same time. We then see these same two braves die repeatedly throughout the battle, just filmed from different angles. When the Indians ride off there are only two bodies that match these braves' costumes on the ground.
Continuity mistake: When they fully cut off the right ear of one of the general's men and stuck it in his mouth, as he walked away, they shot him in the back. As he is falling to the ground, you can see his ear is still attached to his head. (00:42:45 - 00:43:15)
Continuity mistake: Aguilar is restless during the party, and he picks a tarot card from the table, which turns out to be Death arcane. In close-up the card is held by a single hand, but Frank Wolff is holding the card between both hands both before and after that shot. (00:42:20)
Continuity mistake: When Tom rushes up with his knife, fork and dish to get his dinner from the cook, you can see that Tom's knife is pointing straight but in the next shot it is now pointing to the right.
Continuity mistake: A shoulder wound Raquel Welch has becomes a graze to the upper arm in the next scene.
Continuity mistake: While pointing his pistol at Matt Diggs, the Rabbi cocks the pistol's hammer. A split second later from another angle, the pistol's hammer is down.