Before Jin and Mei are trapped by the bamboo spears they are standing among hundreds of short bamboo spears pierced into the ground as a trap. When the soldiers get killed by The Flying Daggers and fall down to the ground, the short bamboo spears are all gone.
As Mei is in the bamboo forest, split between the two bamboo trees several bamboo spears are thrown at her. Two pierce and get wedged in the bamboo trees level with her head. As Mei is sliding down the bamboo they are gone.
In the ending scene when Mei tells Jin to leave, the horse he uses to depart upon has white socks on its rear legs then it has solid leg markings. It changes back and forth from markings to none on Mei's horse also.
At one point during a scene between Jin and Mei, we seen Jins face on the left of the screen with a tree in the background on the right and his hair completely straight. The shot then cuts to Mei and then back to Jin where we see him with a tree on his left and his hair being blown by wind.
An obvious camera reversal during the ending scene whith Mai and Jin. When Jin is seen, the snow is flying from left to right, the camera changes to Mai and back to Jin and the snow is flying from right to left then again from left to right.
When Mei is feeling Jins face and body in the woods, you can clearly see Jin has an arrow sling on his back with 5 arrows. When Jin is saving Mei from the troops by firing arrows, He has more than 5 arrows in his sling.
At the end of the Echo Game, the captain throws the entire bowl of white beans which bounce off the drums and ultimately fall to the ground. When Mei echoes the movements with her scarves, there are no beans on the ground.
After the Echo Game, Mei uses her scarf to grab the captain's sword and they begin a sword fight. During the fight the captain throws a green bowl at Mei who strikes and breaks it with the sword. As the two continue to fight, there are no green pieces of the bowl on the ground.
When Jin saves Mei from the general's troops in the bamboo grove, he blocks four swords which are swinging toward her simultaneously. One of the blades, however, clearly gets past Jin's sword. Rather than having his attack deflected, this soldier simply stops his swing and lifts his sword away in unison with the others.