The Flintstones house starts out with no front door and then later it has one.
At the end when Barney give Betty her diamond ring, Wilma sticks out her hand not wearing her diamond ring, and immediately after in the next scene she is wearing it.
The word "jewelry" in the jewelry store is spelled "jewlry".
When introducing the champ at the beginning of the fight he's announced as "wearing the leopard trunks" when they're actually all black.