When the Presidente's daughter escapes from prison, she is wearing pale blue stockings. A minute later, after she and Max run away and they stop for breath, she is no longer wearing any stockings.
When Max is using his laser to cut through the wall of the dungeon, you can see that he has trouble synchronizing the movement of the laser with where the flame is moving up the wall. At first it starts up ahead of his hand, then he gets ahead of it and then falls behind again.
At least once, Don Adams pronounces the dictator's name as "Parajito" instead of "Pajarito."