Other mistake: In the flashback of the denouement, Dr. Armstrong is shown dead face down on the beach, with the feet pointed ashore and the head to the sea. Mr. Owen takes also a sip from that Armstrong's flask and tosses it in the sand without capping it. However, Vera and Lombard found a corpse face inland and feet to the sea, and a flask with its lid in place. (01:28:50 - 01:34:40)
Other mistake: When the judge and everyone else observe and comment the fact that two figurines are broken, nobody has a clean line of sight to them; they talk about what the movie spectator is seeing. (00:24:30)
Other mistake: When we see Rogers remove the record from the sleeve, the grandfather clock behind him shows it's 9 o'clock. Several minutes follow as the recorded voice lists all the crimes of the 10 Indians, and in particular when Mrs. Rogers faints, behind her you can see the clock is still stuck at 9 o'clock. The clock returns to advance, and does it quickly, after Rogers hands the note to the judge and Mrs. Rogers yells at him. (00:12:50 - 00:16:10)