Deliberate mistake: In the scene where Marie is trying on shoes, a pair of powder blue high top Converse sneakers can be seen next to her feet. It must have been done intentionally, but since there is no trace of modern apparel anywhere else in the film (the closest would be the mere mention of hot pink dress fabric but, as it's not shown, we don't know what exactly Marie calls "hot pink") these shoes (and the fabric) can't be considered part of a thematic element or artistic license. (00:55:35)
Audio problem: During the wild boar hunt, they are interrupted by Aleander who says, "Prince Frederick of Saxony. He refuses to surrender Luther to you, Your Holiness," but nothing matches his lip movements. He utters a couple of syllables, at most, out of sync with the two full sentences heard in the movie. (English DVD version). (01:03:15)
Factual error: Jan Christiaan Smuts is referred to as the Prime Minister of the Union of South Africa in this film when Gandhi is there. Smuts didn't gain the office until 1919, after the death of Prime Minister Louis Botha. Gandhi left South Africa in 1914 and never returned.
Factual error: Catus Decianus actually managed to escape from the massacre at Camulodunum and fled to Gaul.
Factual error: Throughout the film the British infantry are armed with carbines. These were intended for issue to cavalry and are much shorter than the infantry issue Martini-Henry rifle.
Continuity mistake: In the final destruction-of-the-temple scene, the huge statue of Dagon starts to topple head first, but in later shots it is sliding towards the camera feet first. This is because director Cecil DeMille was not satisfied with the first take and had the temple re-erected then collapsed a second time. Shots from both destructions are spliced together in an exciting sequence, but rather puzzling architectually.
Factual error: The movie is set in Rwanda in 1994. At the start of the movie you see a billboard advert for MTN, a South African cellular service provider that was not available in Rwanda in 1994.
Continuity mistake: At the end, during the fight scenes in the first class cabin, the number of overhead compartment doors that are open changes.
Factual error: Philip uses his left hand to sign the decree declaring Joan officially crazy. No one in the 15th century would have used his left hand to write, as 1) it was considered the wrong hand to write with and 2) writing with the left hand would have smudged the fresh ink and rendered any document unreadable.
Continuity mistake: In the third rendition of the story of what happened at Zhao, Nameless shows that his attack could have immense precision by throwing all the additional sticks in the air along with the white one. Not only does the white stick change trajectory during the scene changes, but at the end the additional sticks all seem to fly in from a barrel just out of sight instead of falling all around Nameless' sword.
Factual error: When the Marines strip off and run into the sea in the final scene, Doc takes off a pair of white socks that would be more appropriate for a final at Wimbledon. Not only are they white rather than khaki, they are virtually spotlessly clean which would be impossible after a week of fighting on the black sands of Iwo Jima.
Other mistake: The chronology of dates on the teletype printer at the end of the film are not in the correct order. We see "March 13, 1975" followed by "January 3, 1975", which is then followed by two August 1974 dates.