Continuity mistake: When the Clampetts are eating at the pool table, Tyler arrives and goes to kiss Elly May's hand. She flips him over and it appears that Tyler knocks a pool cue over on his way to the ground that was propped up against a wall unit. In the next shot, it is back in its place, and no one was seen to have picked it up.
Continuity mistake: In the scene when Jethrow Bodine is sharpening pencils, there is a large bundle of unsharpened pencils on his desk. Then the secretary comes in, and hands him a bundle of unsharpened pencils; the same bundle that was on his desk.
Revealing mistake: When Ms. Hathaway is sitting in her office explaining to Jethrow her computer program for finding his uncle Jed Clampet a wife, she begins typing, but In the shots of the computer screen you can see she isn't typing anything.