Continuity: Although Dark Helmet throws Lone Starr's Schwartz ring down a grating, Lone Star is wearing it in the Winnebago after Mega Maid explodes.
Continuity: After Lone Starr sprays the guard with shaving cream, he gets some on his sleeve. Next shot shows it clean.
Crew or equipment visible: A dolly is visible in front of Dot's feet on the floor just as they approach the feet of the Yogurt Statue. After a cut to the statue and a cut back to them it's covered by the sand on the ground.
Crew or equipment visible: When Dark Helmet goes flying forward after the ship comes to a screaming halt, you can see the intercom/microphone still suspended up in mid-air with a wire holding it up.
Crew or equipment visible: The footprints of the crew, actors and horses in the "Planet of the Apes" scene are all visible on the ground.
Revealing mistakes: A storm trooper starts to move his hand to his crotch before he is supposed to (before dark helmet yells at the crew and they all cover up the groins).
Continuity: When Dark Helmet and Sandurz are watching the tape of "Spaceballs", the scrolling words shown at the beginning of the tape do not match what was actually shown at the beginning of the movie. (On the tape, the letters are all capitals, but are upper and lower case in the movie's beginning.)
Continuity: In the cave, when Yogurt first appears, a door opens in the base of his statue, he walks out, and the door closes behind him. In the very next shot, the door is open again, Yogurt walks out again, and the door closes behind him again. (DVD version)
Crew or equipment visible: During the "Chestburst Alien" scene, when the alien starts singing, you can see the pole controlling the tail of the alien, also the track the pole comes from, briefly.
Revealing mistakes: Whenever Dot Matrix is sitting down, her skirt is made of leather. When she stands up and walks, it is metal.
Continuity: After Dot Matrix rolls down a sand hill, her metal skirt is damaged. In the next scene it is undamaged.
Continuity: During LoneStar and Barf's rescue of the Princess and Dot, they run into the two guards which they had stolen their uniforms from. Those guards are wearing the helmets that LoneStar and Barf were clearly wearing the scene before.
Revealing mistakes: When Lonestar sprays shaving cream at that guard, the guard obviously breaks his fall with his hands when he falls forward
Continuity: In the scene where Princess Vespa is threatened with plastic surgery, the nurse zips up her shirt, but in the subsequent shot, her shirt is still unzipped.
Miscellaneous: When Roland solicits help from Lone Starr, they talk like they know each other (after all, Roland hails him by name), yet Lone Starr and Barf act surprised that they have picked up a Druish princess.
Crew or equipment visible: In the hover car scene, when Lord Helmet is looking through the binoculars you can clearly see the hover car is half a prop with a piece of glass or a mirror covering the bottom section. You can distinctly see a difference in the sand under the hover car, as opposed to the surrounding area.
Continuity: The scene in which Barf is carrying Dot, the actress who plays Dot's shoes can be seen underneath the metal feet.
Revealing mistakes: When President Skroob is beamed into the next room, his head gets turned backwards. Yet for some reason, no-one notices that his hands have also been reversed.
Crew or equipment visible: In various scenes when Vespa and Dot Matrix are in the Mercedes, you can see the blue screen reflecting off Dot Matrix's casing.
Continuity: In the scene where they enter the cave, Lonestar and Vespa can be seen switching from holding hands to not holding hands in between the walk to yogurts statue.
Continuity: Dark Helmet introduces the nose job man as "Dr. Philip Schlotkin". However, on the photo of Princess Vespa and her old nose, on the bottom it says "Dr. Irving Schlotkin".
Revealing mistakes: In the scene where Lone Star and company first meet Yogurt, a closeup of the statue is shown, with smoke moving in a very slow and choppy manner relative to the other shots in this scene. The film is playing at a slower rate than usual.
Revealing mistakes: When Megamaid is blowing the air back onto planet Druidia, the camera shows a line of trees being put back into place, but the dust/smoke around them moves in a manner inconsistent with this (it is clear that the earlier shot of the trees being ripped up was reused and played backwards).
Errors made by characters (possibly deliberate errors by the filmmakers): In the diner (visible when the alien is singing and the cook exits the kitchen), the kitchen door reads "EMPLOYEE'S ONLY"; the apostrophe is incorrect.
Continuity: When Dark Helmet is pulled horizontal by Ludicrous Speed, a nearby window clearly shows the stars dead still.
Continuity: Just before Spaceball-1 rendezvous with Princess Vespa's Mercedes, the icons for the two ships (on Spaceball-1's teledar screen) are drawn and moved as though the two ships are approaching nearly head-on. When the camera cuts to an outside shot, Spaceball-1 is instead shown trying to catch up with and overtake Vespa's ship.
Revealing mistakes: When Commanderette Zircon calls Skroob in the bathroom, her image and that of her surroundings is not properly perspective-shifted to match the camera angle and perspective of the wall on which her transmission appears.
Continuity: When Vespa and Dot are captured near Yoghurt's temple, a guard pulls something out of Dot's back and throws it away, completely disabling her. The next time we see Dot (with Vespa, in the cell), Lone Starr and Barf are entering the cell, but Dot is seen to wake up before anyone has had a chance to electronically revive her.