In the first Flintstones movie, Fred stated that he met Wilma after she cleaned him off in an eating contest. In this movie, they met at a carnival after a date swap when Fred met Betty at a fast food restaurant, and Betty introduced Wilma as a date for Barney.
In the party scene, after Dino runs across the table and makes a mess, Wilma's mother's hair has some debris in it. She wipes it off with her hand, then in the next scene a piece is back, she picks it off, and in the next scene, more debris is back in her hair.
After Wilma takes a short walk and is stopped by Chip, the elevator door closes, then reopens when a lady pushes a button, a few seconds later, someone else pushes the button and it opens, not taking any time to move from the floor it would have gone to, and there's no one inside.