When Shang arrives at Mulan's house to speak with her, he leaves his horse standing in the middle of the field when the girls come running to him. But after Shang hands his helmet to Sha Ron, we see her running across the field but Shang's horse is no longer there.
When Mulan and Shang are summoned to the Emperor for an important matter, Mulan is wearing a purple dress. When she and Shang are preparing their horses to ride to the Emperor's palace, Mulan is wearing a green and yellow riding outfit. When she, Shang, and the Emperor are shown speaking, Mulan is again wearing the purple dress.
As Mulan practices martial arts during her chores with the rake, the head of the rake is not visible whenever she twirls it, and in a few more scenes before she kicks it off at the beginning of "Lesson Number One".
When the princesses are escorted into the cart, Ting Ting first speaks to General Shang, sitting to his left. When Mulan comes into the picture, Mei is sitting in the same spot Ting Ting was previously sitting, but when they are shown again, Ting Ting is sitting in her previous spot and Mei is sitting opposite from her.
In ancient (and even some modern) Asian cultures, a noble woman's bare feet were considered almost as private as her genitals. A princess would NEVER have extended her bare foot to a soldier, no matter how gallant.
The symbols for Yin and Yang are in fact correct, but the white half is considered masculine while the black is considered feminine in ancient Chinese culture. Mulan is handed the white half of the necklace pair while Shang is given the black.