Other mistake: During the battle in the cavern, the (almost) bald Indian Warrior helping Ghost is stabbed by a Viking and dies in Ghost's hands. When Ghost kills the Viking and continues on, you can see the Indian Warrior still breathing. (Timecode refers to the European Extended Edition). (01:01:55 - 01:02:55)
Continuity mistake: The writing on Ghost's sword early in the film has the Turisas rune (representing TH in Thunder) near the hilt, but later not only is a different font used but now the Dagalas rune (representing the D in sword) is at the hilt.
