When the Chosen One talks to his friends while they're wounded in the field, he has a tattoo saying "Mouth" with an arrow on his right cheek. The tattoo is given to him by an old man in a deleted torture scene, and can't be seen in any other scenes in the film.
When Master Pain first appears in town to demonstrate his skill, he is wearing his robe while following the mayor. In the next shot, he doesn't have the robe on (a shot where he rips it off was filmed, but omitted).
When the Chosen One is running backwards, he runs over Wimp Lo, but Wimp Lo is in Master Tang's clothes in the shot where he runs over him.
When the Chosen One is fighting Moon Yu, he pulls and flicks on the upper right udder. In the next shot, it is the lower right udder that he is flicking.