As Pete Menlo (Howard Duff) starts to leave Bannon's (John McIntyre) office Drake, (leo Gordon) starts to go for his gun to shoot him but Bannon stops him. The gun is reversed in the holster so that the handle is pointing forward but in all other shots of Drake the gun is the right way round.
Jackpot (William Demarest) has a large rock in his hand while he's talking to some miners inside the Menlo no 1 mine. He still has it in his hand as he walks towards the entrance but he's lost it when he gets outside.
Leo Gordon sports a crew cut. However this hairstyle was not found in the US until the late 1890's.