Factual error: When the B-52 is flying low over Russia, the shadow on the ground is a Boeing B-17G, a World War II propeller driven bomber.
Factual error: The Robin that comes along in the movie is an American Robin, not a British Robin.
Factual error: Inspector Clouseau's watch may be broken but Hercule's doesn't keep very good time either. They synchonise watches at 7:47. 18 seconds later, Hercule says he has 7:47 and 23 seconds. (01:28:14)
Factual error: Towards the end of the film, the British slaves are escaping out of the window. As they rush over to the window, one man's costume flies up. Lovely pair of red underpants he's wearing.
Factual error: Elvis and Ann Margaret take a trip in a helicopter over Hoover Dam and Lake Meade. They are flying in a small 2 seater copter with a bubble canopy and no doors. During the trip Elvis and Ann talk to each other without headphones or microphones in a normal tone of voice. In that type of helicopter, especially one with no doors, the sound would have been deafening and they wouldn't have heard each other even while screaming.
Factual error: They're meant to be taping a TV show, but some of the cameras were motion picture cameras used for shooting the movie, rather than TV cameras. (01:16:45)
Factual error: Fakrash is a genie who served under King Solomon and he himself says that he's been imprisoned for 3'000 years. Yet the whole aesthetics of his clothes, decoration, architecture is the stereotypical Arabian Nights one, which would be several centuries posterior to his times and almost as foreign to him as the present day one.
Factual error: The radio Walter uses on the island has no apparent power source; we never see either batteries or a hand-cranked generator.
Factual error: Ma Tatum, while bemoaning Pappy's misfortune, sits herself on a burlap bag marked "Mash". Mash, the basic component of moonshine, is a semi-liquid, and couldn't be stored in a burlap bag.