Other mistake: Whenever Fozzie is driving the Studebaker, the movements of the car don't correspond to the way he moves the steering wheel (he tends to crank it back and forth a lot).
Other mistake: When Brian is being chased by people who believe he is the Messiah, Brian loses a sandal. They all think it's a sign and run after him with one sandal in their hand. Thing is, when you see them, thay all have both sandals on their feet, yet most of them are holding a sandal. Where did they all get their third sandal from?
Other mistake: When Jackie is singing in the restaurant and the evil guys tell everyone to leave, there is an old man on the stairs in the background. Two shots later the stairs are shown again and the man is gone. He was walking too slow to have gotten off of the screen that fast.
Other mistake: Before the hall monitor folds the note into a paper airplane, the note has creases as is it was already folded into a paper airplane, and then flattened out for a different take.
Other mistake: When Harrison Ford and Gene Wilder are being chased by the bad guys, they're discussing whether the sun is setting, and there is a shot of the sun going behind a ridge. When the actors are shown again they are in full light, and not in shadow as they would be if the sun was going down, even though Gene is bobbing up and down as if he's making the sun go higher or lower by the position of his head. (This is so that they can remount once the sun has gone down, as the Jewish day of rest will have ended.)
Other mistake: There is no tea or any other liquid that spills out from the overturned kettle and cups, when Mrs. Kissell 'drops' the serving tray on the Reverend's coffee table.
Other mistake: Teri Lynn, the founding member of HOTS, who comes from somewhere like Arkansas or West Virginia's accent disappears from the movie several times.
Other mistake: Lauren Tewes' character is credited as "Jessie", but the name tag on her waitress outfit says "Jesse." (00:17:00)
Other mistake: Handsome and Charming head out of Snakes End (followed by the newlyweds) and begin their long journey. It then cuts to Cactus Jack before he begins the journey, and at the start of this shot as he places Whiskey's bit, we can see the signpost with three wooden arrow signs and the hillside behind him. This is the same location where Cactus Jack lays trap number seven, named "the tunnel in the hillside," on the next day during the journey; noticeable when Handsome and Charming arrive. (00:28:35 - 00:54:45)
Other mistake: Miss Froy writes her surname in window condensation on the train before she is abducted, where it's supposed to have remained visible for hours, which is dubious in high summer. Then it all of sudden disappears as they go through a tunnel, but why would going through a tunnel cause condensation on inside of train window to all of a sudden disappear?
Other mistake: The chandelier falls at the crystal ballroom and Wally drops. You can see he's nowhere near it but he still falls down.