Revealing mistake: During the scene in Clouseau's hotel room at night, there is a light outside which shines on the net curtains to simulate moonlight. This light is off when the room lights are on, and is turned on when the room lights are turned off. At one point, when Inspector Clouseau is going into the bathroom after giving the sleeping pill to his wife, the fake moonlight suddenly turns on for no reason.
Continuity mistake: After the trial the crowd of onlookers rushes up the steps of the courthouse - there are 2 shots of this, one from in front and one behind. The crowd is different in the two shots. E.g. at the front in the first shot is a lady in a white coat and a lady in a green coat and red hat. Leading the pack in the second shot is a lady in a green coat and black hat.
Continuity mistake: After the two gorilla's have found the safe empty they are chased by the police. Gorilla George jumps in his red car and exits through the gate to the left side (of the screen) followed by a closed police car. Then gorilla Charles comes through the gate in a silver car, exits right (ditto) followed by a police jeep. (Thus indicating different roads followed) The next shot starts the town square scenes. First enters George in his red car, followed by the jeep, third is Carles with the silver car and chased by the closed police car.This surely could be possible during the confusing runarounds, but not at the start of it.