When Satan is destroying the clay village, the little clay boy is dead in the background before Satan destroys him.
During scenes in the deck of the airship after they enter the comet, dirt and seams are visible on the rear projection screen.
When the Billiard Table Balls are jostled in the Storm they mount up in the corner of the Table, instead of falling into the Corner Pocket.
As the airship nears the comet, wires holding the asteroids that attack the airship are visible.
All the characters pronounce Halley's Comet with a long a. The comet is named for Sir Edmund Halley, whose name is pronounced with a short a. This is also an error nobody would have made at the time, as this mispronunciation only began with the band Bill Hailey and the Comets.