Language, movies

[CarmenG@aol.com]

This talk of old movies reminds me of a question I'd like to ask the native 
Italian members, who have helped me with my Italian in private e-mails.
In the United States, the movie I Soliti ignoti is called Big Deal on Madonna 
Street. That is obviously not the real translation, but can anyone tell me 
what I Soliti ignoti means? Is it translatable? Idiomatic?
This is not as off-topic as it seems, for Donald Duck appears in this movie!

Carmen