I always thought it was "the whole kitten caboodle". Until like five years ago. Eventually I read it as "kit and caboodle" somewhere, and loudly accused the author of being an idiot until someone set me straight. And even then I didn't believe it. Do you know what finding out that there's no such thing as a kitten caboodle does to a person? I'll tell you what is does: it destroys them.
I'd be willing to bet that you remember Sara Lee's slogan as: "Nobody does it like Sara Lee", even though it's actually "Nobody doesn't like Sara Lee." Yeah, I know. I'd like to get into a physical altercation with the person responsible for that crap.
Oh, and just the other day I learned that it's "beck and call", not "beckoned call." Which actually didn't bug me at all. They both suck.