When Eddie and Michel are taking a shower in the shack, there's big smudge of dirt on Michel's face whenever the camera is close to her face. When the camera cuts wider to show Eddie as well, suddenly the smudge disappears. Then it reappears again.
When Eddie and Michel are escaping from the two Deveneux fishermen, Eddie knocks the door off the car while backing up. When the door comes off, Michel is no longer in the car. In the next shot she is in the passenger seat again.
The cat's trainer is briefly visible from under the hotel clerk's desk while Eddie and Michel are waiting for Losado.
When Detective Jilette describes Michel Duval to a tattoo artist, he says she is about five foot six, but in reality, Kim Basinger is almost five foot eight. Even though he is making an estimate, one would think that an experienced detective would be able to gauge people's heights with reasonable accuracy.