Other mistake: When Col. Bat Guano shoots the Coke machine and it squirts him in the face, he's holding his head too high. You can see that he first gets the spray on the chin and then he ducks down to take it full in the face. (01:09:50)
Revealing mistake: During the first major Zulu attack, a warrior leaps down from the rampart and faces a British soldier (near the bottom right of the screen). The soldier lunges with his rifle and it's all too visible that his bayonet stabs to the side of the Zulu's chest.
Continuity mistake: After the opening credits, when it cuts to the overhead shot of Shannon sitting on the ground, he has a newspaper covering his head with its front page facing up. In the next shot, the newspaper over Shannon's head has a different front page. (00:06:00)