Mistakes
When Wanda asks Ken if he's heard from George Ken stutters "No, he had to go to the b-b-b", as it cuts we can see his mouth is closed. It's impossible to say "b" with your mouth closed. See more...
Trivia
John Cleese's character name, Archie Leach, was Cary Grant's real name (Archibald Leach). John named his character himself as a tribute because they were born in towns near to each other. See more...
Movie Mistakes blog
Popular blog posts:
Top 15 biggest Harry Potter film mistakes
The 10 biggest mistakes in Iron Man 1 & 2
15 biggest mistakes in Titanic
Other great sites
A Fish Called Wanda (1988) - 2 easter eggs
Directed by Charles Crichton, starring Jamie Lee Curtis, John Cleese, Kevin Kline, Michael Palin (add more)
Easter eggs are hidden bits on DVDs which if you know where to look can provide all sorts of fun extras.