Continuity mistake: When Cactus is sneaking behind a bush, chuckling before Handsome's cart drives over the glued planks, he covers his mouth with his left hand. From the opposite angle, it's lowered. (01:16:28)
Continuity mistake: While being chased by the Indians, Charming's shawl is either on or off her shoulders; there is no continuity.
Continuity mistake: Cactus Jack's leather cowboy boots have block heels and spurs with rowels and jingle bobs. In quite a few shots throughout the movie, Jack's boots change to no-heel flat soles, and the spurs are missing, though we still hear the distinctive jangling of Cactus Jack's spurs.
Continuity mistake: After Cactus plays the organ, he greets Handsome, his hand on the blue seat. From a different angle, his hand is on his thigh.
Continuity mistake: Despite Cactus' feet being firmly glued to the floor, their position changes noticeably between instant cuts, from being V-shaped to parallel to each other.
Continuity mistake: When Charming is setting up her bed in the wild, the light is sunny, but from Cactus' aerial POV, it's shadowy. This swaps back and forth.
Continuity mistake: When Cactus is about to be run over by the train, the shadow he casts changes drastically between shots.
Continuity mistake: After Cactus' carriage with the organ crashes, the position of the stuff around the carriage changes between shots.