Continuity mistake: In the rain scene after Guido & his princess are in the rain, the steering wheel becomes detached, and he holds it up, and you see hardware still connected to the steering wheel. When he puts the pillow on top of it for her to use as an umbrella, you don't see the hardware. During this scene, Guido places the pillow directly on top of the steering wheel, and in the following shots, you don't see the actual steering wheel; only the stick.
Continuity mistake: In the scene with the electric shock treatment, Dr Yealland's shirt switches from army khaki to a purplish colour and back again several times.
Continuity mistake: When the Spanish and German defenders of San Juan hill are loading their Maxim machine guns, the cartridge belt is being inserted from the left side. During the fighting, the cartridges are entering the chamber from the right, and the expended belt is exiting on the left.