Factual error: There is a scene in which Piter DeVries is talking about the Landsraad (one of the governmental organizations in Dune). Twice he mispronounces the name, saying "Lansdraad" instead.

Continuity: Depending of the version, in the final confrontation between the emperor & the Harkonnen and Paul & the Fremen, you can see Thufir Hawat standing in the crowd of imperial side. After the battle between Paul and Sting he has suddenly disappeared. This is due to there being different, much longer versions of the same film. There is a 120 minute version, 180 and 190 minutes, and apparently in Singapore you can buy a 240 minute version. However in the long versions the stains on the lips of Thufir and Pauls totally blue eyes do not appear in the extra scenes: now you see it, now you don't.

Revealing: During the invasion of Dune by the Harkonnen, a Sardukar soldier throws a guard from what appears to be the palace's wall. When he hits the ground all the bodies around him bounce as if they where lying on some sort of cushion.

Continuity: The main character Paul is tied up on the floor next to his mother, who is also tied up. Paul tries to use his tied feet to fight, but is easily kicked back down to the floor. Then, very briefly, but , Paul is half unconscious with his arms NOT tied anymore, but next to his head. The next scene has Paul's arms tied up again and his mother says 'cut my son's bonds'.

Deliberate "mistake": The Fremen wear "stillsuits" to conserve their water, yet leave their heads completely uncovered. This would result in quite a bit of water loss through perspiration. (In the book, they wore hoods, masks and nose filters, leaving only the eyes uncovered, but it wouldn't work in a movie to have all the actor's faces obscured!).