Revealing mistake: In the first scene on Ginger's sister's boat that's being refitted, one of the seagulls (yes they used real seagulls) flies over the stern end right into the cyclorama and takes a nose dive to the stage floor.
Revealing mistake: During the fight in the prison, you can see that the doors are really cheap. A policeman is pushed on one of them and it opens. Not really efficient to retain prisoneers. (00:26:40)