When Zhou Yu is receiving treatment for his arrow wound, his chest is covered in blood. The next shot, the blood is gone, without anyone wiping it away.
A sleeping baby is shown with blood spattered on his face in one shot, and in the next shot his face is completely clean.
(Approx. 45 min. American version) During the tortoise battle, one of the generals retrieves his spear from the chest of an enemy. Naturally, it is covered in blood when he grabs the shaft, but when he withdraws it in the next shot, it is completely clean.
At 1:56:56, after the first battle, there is a shot from a low angle where you can see the generals sitting on there horses, showing the soles of their shoes. You can clearly see that their shoes have sneaker soles.