Other mistake: In analogy to David's mishap with the champagne glasses old Mr. Larrabee crushes an olive jar when he sits down. However, in contrast to David he puts the jar into the front pocket of his pants, and olive jars don't break even if you sit on them (remember what he did to one when he tried to get the last olive out.). (01:46:55)NancyFelix
Other mistake: When they encounter the first ant, the policeman runs out of ammo, but the FBI agent fires at least nine shots. Not bad for a snubnose revolver that holds 5 or 6 rounds.
Other mistake: At the end of Goin' Courtin', Daniel says "fighting and trapping" in the wrong order. You can just hear him if you listen very carefully but it is really obvious if you watch his mouth. (00:36:55)
Other mistake: The judge in giving sentence refers to the murder occurring on the 27th September. Towards the end of the film the implication is that the murder occurred on the 27th March e.g. he started living on the cash from the 27th March.
Other mistake: When Daffy uses the elevator-like device to bring the second floor down to the first floor, there is a useless outside door on the second floor.