Revealing mistake: In the opening scene when Bond pushes Blofield in the mud and we see his legs dissappear, they are obvious dummy legs and the feet have changed position.
Revealing mistake: During the fight between Bond and Peter Franks in the elevator, if you watch carefully when Bond hits Franks' wrist with the door while he is holding the glass shard, Franks drop the glass shard before his wrist gets hit a second time.
Revealing mistake: When Mr Wint puts the scorpion down the back of the doctor's shirt while he is looking at Mr Kidd's wisdom teeth, the scorpion is made of plastic and not a real one.
Revealing mistake: When Mrs Whistler's body is being removed from the canal in Amsterdam, it's clear in the long shot that it is just a dummy.
Revealing mistake: When Bond knocks Blofeld unconscious with a lamp in the fight at the start of the film, look carefully and you can see that Blofeld is already knocked out before the lamp comes into contact with his head.
Answer: Bond's answer to Felix at customs is "alimentary, Mr. Leiter". As in the alimentary canal of a human.