Revealing mistake: In the final fight scene in the desert between Broken Sword and Flying Snow, when the camera cuts to the wide shots of them standing there, looking at each other, you can see tire tracks in the sand. (01:24:30)
Revealing mistake: In the opening sequence, as Nameless is entering the Emperor's palace, you can easily see in the close up shots that the crowd of black-clad people on each side is at best three rows deep. However, shortly before he actually reaches the far side of the inner courtyard, the camera pans back to reveal thousands of people, filling the courtyard from one side to another. (00:03:05 - 00:04:25)
Answer: Those were two different swords they had at the end. You can tell because when Broken Sword's weapon hits the sand when he drops it, you can clearly see the tapered point, not a broken edge.