When Hank and Castleberry are arguing at Jules' mansion, Moses the servant passes behind them left to right carrying a tray of drinks. In the immediate wider shot, he does so again.
When Hank comes home with the verified weights, a truck with no windshield pulls up with the armed men. In the next shot, the windshield is now present.
When Brown's body is being carried out of the courtroom by six men, Brown is holding his head up. Neither one of the men supporting Brown's shoulders is doing anything to support the head.
The alligator that attacks Verity and Flamingo is an obvious prop.
When Hank goes to Jules front door, he uses the knocker to knock 3 times on the door. But on the third time he inadvertently pushes the knocker up instead (which should not have made a knock sound). BUT it still makes the knock sound anyway.
(at around 15 mins) Hank and Verity are walking towards Mr. Castleberry's mansion, a boom mic shadow can be seen moving in front of them, going from the top to the middle of the screen.
Robert L. Castleberry IV tells Hank Martin that if Martin repeats such statements to a living soul, he will swear out a warrant for his arrest for criminal libel. Martin then says he's been reading up about criminal libel in law books and agrees that the punishment for libel that Castleberry stated is accurate, unless the statements happen to be true. Martin then repeats his statements to Moses ("a living soul"). However, in order for the crime to be libel, the false statements must be in written form. Simply stating falsities about a person would subject them to a charge of slander. Someone who knows the laws or has read law books about libel would know the difference.