Clouseau falls into the fountain at the beginning. Yet when he puts a lit lighter into his wet coat it catches on fire.
When Clouseau is carrying Maria up the stairs, the bottle switches from his left hand to his right, while the two glasses in his right hand switch to his left.
During the first assassination attempt at the flamenco restaurant, the bullet shatters both Clouseau & Maria's glass and passes on to the guy sitting next to them. If you watch the scene in slow motion, Clouseau's glass breaks a fraction of a second earlier than Maria's. It should be the other way around if the bullet is coming from the right.
When Clouseau answers the door bell and finds a package (a clock with a bomb) you can see clearly that someone has left the keys in the door lock as he opens the door.
When Clouseau and Maria entered the apartment minutes earlier, Clouseau put the keys in the lock but we never see him take them out. Clouseau's mistake, not the filmmakers'.
When Clouseau and Maria entered the apartment minutes earlier, Clouseau put the keys in the lock but we never see him take them out. Clouseau's mistake, not the filmmakers'.
When Clouseau enters the recreation area of Camp Sunshine (the nudist camp), a person in the background can be seen with a red towel that could be mistaken for clothes.
Clouseau puts his still-lit cigarette lighter into the front of his trench-coat, but the smoke starts coming from the back. There are also no burn holes or anything when he frantically removes it.
The saxophonist at the nudist camp is wearing boxer shorts.
When Clouseau walks up to the bench where Dudu is "sitting" while at the nudist colony, it is obvious that Peter Sellers is wearing dark-colored swim trunks while holding the guitar.
When Inspector Clouseau gets ready for a date with Maria, he asks Cato to set out his new blue suit, but he is dressed in a black tuxedo the whole evening.
When Clouseau first visits Ballon's house he falls face down from a first floor window onto the grass, yet when he gets up there is no sign of any injuries or even grass stains on him.
Clouseau at one point suggests that Maria might be guillotined if found guilty, but the French government had ceased to guillotine women since 1949 (French men were not so lucky, however, and had to wait until 1981 before the statute was finally expunged).
There was no reason why women could not have been guillotined between 1964 (the year the film is set in) and 1981, as there had been no change in the law, and in theory they could still have been executed if the murder(s) they committed had been deemed serious enough, for example the murder of a child.
When Jacques Clouseau finishes interviewing Maria Gambrelli, the world globe has Australia clearly in view. After she leaves, Clouseau goes to the window, and then goes to spin the globe, and the globe has been repositioned with Australia no longer dominant.
The nameplate shows Clouseau's flat as being on the 1st floor but the one he takes Maria to after their night out is clearly an attic flat (sloping walls show it is inside the mansarded roof). Furthermore it is not the flat in which he is shown living earlier.
During the billiards scene, when he accuses Monsieur Ballon of murder, Clouseau calls him "Inspector Ballon".
The Japanese name Kato is pronounced throughout as Kayto rather than the correct Kahto. This error is copied from the Green Hornet radio and film-serial series which is being spoofed.
When Clouseau is in his office he calls for Hercule but accidentally calls for Miguel before he realizes his mistake.
All French characters speak English instead of French.