As a barber, Woyzeck smears some foam on the Captain's forehead, but when the camera changes, the foam's gone.
Blood stains on Woyzeck's sleeve continuously change their extension and color from one scene to another.
In the opening credits scenes we see Woyzeck being coerced into conducting a series of military drills by the drill instructor. Woyzeck has his rifle slung over his left shoulder. This is incorrect as it should be on his right shoulder. Additionally, he also brings his "rifle down" to the incorrect side. The Prussian Army shouldered their rifles on the right shoulder (facing front).