Goofs

Leto bites down on, and breaks, the false tooth, but it reappears in a subsequent shot.

When Paul is in the desert trying to ride the worm, the red coloring on the shoulders of the Feydakin are visible, but Stilgar did not mark the Fedaykin until before the Fremen started attacking the Spice harvesters, which happened after Paul had ridden the worm.

Both, Duke Leto Atreides and his son Paul wear changing rank insignia on their dress uniforms. On planet Caladan, Paul wears an eagle, a star and a bar, as does his father and his friend Duncan Idaho, which makes no sense at all. During their space travel to Arrakis, Paul's epaulet sports an eagle and two stars, Leto's an eagle and three stars. This is logical, because the duke is one military rank above his heir. On Arrakis, the epaulets of their desert camouflage uniforms are the same as at the start of the movie.

When Paul kills the Fremen in the knife fight in the cave, tears can be seen running down his face which is also covered in dirt. A few moments later his face is clean, but he hasn't had enough time to wipe all the dirt and tears away.

After Baron Harkonnen kills a young man in Giedi Prime, there is a head-shot showing Baron's face covered in black oil. Camera focuses briefly Feyd-Rautha (Sting) and then backs to the Baron, but his face is cleaner than before, and there is blood in the left side of his forehead.

In the morgue scene in Arrakeen, the establishing shot shows two Harkonnen corpses, one in the foreground and one in the background. The body in the background adjusts his head to find a more comfortable position.

During the first battle of the film Rabban is seen throwing Atreides' conscripts off of a bridge. When Rabban throws a man off the bridge you can see the ground shake a few feet around the man as if he lands on some type of padding rather than solid ground.

Stars visible through planets in several scenes.

When Feyd-Rautha is carrying the cat and accompanying the Baron down the stairs, you can see a few glimpses of the two fishing lines helping the Baron fly.

During the first attack, a Sardaukar soldier reacts to a weapon hit a split second before it actually happens.

The closing credits include a typographical error, where 4 "Administrative Staff" are described as "Admistrative Staff"

At 1 hour 28 minutes and 40 seconds, Paul is seen standing next to Chani his eyes are blue, in the next scene Paul's eyes are normal. At this point In the movie Paul has only been on the planet Dune for a few days, it takes years of extended exposure to the spice for ones eyes to become blue, like the Fremen. Which happens to Paul later in the movie.

When Stilgar marks the Fedaykin shoulders with red paint, blood, he says there are 15 of them. Right before Paul takes the water of life, freeze frame and you will see 16 of them.

Watching the Guild Navigator entering the emperors chamber if you you look to to the left one of the attendants falls down.