Other mistake: King Arthur is on the far right of the scene as Guinevere is led away by the guards and he nods at someone off camera, asking them if it's OK to start acting as the camera moves around.
Camelot (1967)
1 other mistake - chronological order
Directed by: Joshua Logan
Starring: Richard Harris, Vanessa Redgrave, David Hemmings, Franco Nero
Revealing mistake: In the scene where King Arthur expounds on the joy of his kingdom, he has a Band-Aid on the back of his neck. (00:21:00)
King Arthur: Proposition. It is far better to be alive than dead.