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.
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.
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: After Lonstar sprays shaving cream in the guard's face, he gives him the "Vulcan Nerve Pinch" to knock him out. As the guard falls, he knocks Lonestar's ring off his finger. In the next shot, Lonestar has the ring on again.
Revealing mistakes: When Lone Star and Barf take the uniforms from the storm troopers there is not tail hole in either uniform, but then you can see Barf's tail sticking out the back.
Plot holes: When Barf and Lone Star rescue the princess and Dot Matrix from being brought into Dark Helmet's ship, they can breathe in space, implying that everyone else can to. Which destroys the motive of wanting to steal Druidia's air supply, and since it is not revealed in a humorous fashion, it is a mistake.
Revealing mistakes: When Lone Starrs Winebago is overtaken by Spaceball One the plaid pattern trail of Spaceball One is moving in the view through the windshield. Then the camera switches to show Lone Starr and Barf and the plaid light pattern reflecting off the back of the cabin is static.
Continuity: In the scene when Yogurt shows Lone Starr & the gang his Schwartz ring, when the shot zooms in to a closeup of the ring, you can see the "S" on the ring has a different appearance than the earlier shot.
Continuity: In the scene where Lone Starr and Barf jam Spaceball 1's radar Michael Winslow calls over Colonel Sandurz and Dark Helmet. Right before Dark Helmet says "raspberry", Michael Winslow puts his hand over his mouth. In the next shot his hand isn't there anymore.
Revealing mistakes: The video cassette of "Spaceballs: The Movie" that Dark Helmet and Cnl. Sandurz gets from Mr. Rental starts out with a single frame FBI Warning (FBI symbol on the left side of the screen and the "WARNING" text on the right). The MGM/UA Video releases at that time had a warning screen that had the word "WARNING" at the top of the screen with the pertinent information scrolling to the top of the screen.
Crew or equipment visible: When Dark Helmet is throwing some Shwartz to Lone Star, we can clearly see Pullman's stunt double.