Plot hole: You can't really apply a lot of real logic to a 'Flinstones' movie, but they must at least adhere to their own logic set-up through the story line: When Fred is taking his 'driver's test' to be a bronto-crane operator, he takes the test on a mechanical, fully-functional simulation of a real living bronto-crane. This makes no sense, for the only reason they use animals for the mechanical devices in their 'world' is because they haven't yet reached an industrial stage in thier evolutuion and don't have the knowledge or skill to build complicated mechanical devices. Yet, they somehow have built a giant mechanical bronto-crane, which is an improvement and advancement over the living version.

Continuity: In the beginning of the movie when the letters of "Univershell" rotate around the Universal-logo globe, Earth is pictured as preglacial one-continent planet. When it's pictured as a background looking from out of the UFO it's the regular spaceview of Earth.

Continuity: In the 1st movie Fred says he met Wilma when he won an eating contest and she cleaned him off, but in this film we see he met her at a fast food restaurant and she originally dated Barney.

Continuity: When Gazoo crash-lands his flying saucer, the top portion of his helmet and his antenna are shown to serve as the roof of the spacecraft. This is what Fred grips to try and open the saucer. While attached to the saucer, the top of the helmet is completely smooth except for the antenna sticking up. However, once Fred has loosed Gazoo from the ship, Gazoo's helmet now has a prominent ridge running the entire length of the helmet from front to back. This ridge should have been, but wasn't visible while Gazoo was still in the ship.