In the restaurant, Mr. Ellis gives Sarah a choker necklace. It's extremely tight-fitting, and this is explicitly commented upon. Later in the same scene, the necklace is clearly much longer, and Sarah easily removes it by lifting it over her head.
Towards the beginning of the movie, Father Clifford is standing in front of a brick wall when Roger jumps from a window and lands on Clifford. Clifford goes down, but the camera does not move. Right before Clifford and Roger get up, the shadows on the brick wall instantly shift, revealing that scene was edited together from multiple takes.
When Martin is punishing Clifford and tells him Dinosaur World is out, Clifford responds, "I don't understand." However, when he replays the conversation that he had surreptitiously recorded, his response becomes, "that would be a mistake."
Martin's answering machine message says "...I've got a bomb under City Hall." When Clifford was recording their talk, Martin never said "under". If that was in the answering machine message originally, there is no way that Clifford could have known the exact moment Martin would say "under" or "number" which sounds like "under". Furthermore, the "I got a bomb" could not have been the length from "Hello, this is Martin Daniels. I'm not here right now..." until "under". It would have made much more sense if Martin's line to Clifford had gone: "I've got a bombshell for you, young man, I happen to be the boss under this roof, and you cannot fight city hall."
When Clifford was going very fast on Larry the Scary Rex, there are strings attached to the harness visible behind the skeleton sitting next to him.
The mini-mart clerk is played by Shelley DeSai, and later in the movie, the same actor can be seen at the anniversary party walking by the camera after Martin was taken away by the police. Why would a mini-mart clerk be at a rich mansion for an anniversary party?