When Prudence takes the photo of the reverend, the lens cap is off. Once the photo is taken and the camera is shown again, the lens cap is back on without her placing it there.
Level of whiskey in the bottle that Benny drinks from.
It's supposed to be set in the 1840s (so the prostitutes say, and the Cavalry uniforms attest), but the pistols are cartridge loading, a type not available until after the Civil War.