Why the title change?

I think that The Unidentified Flying Oddball must be it's original title though it will always be A Spaceman in King Arthur's Court. My mother recorded this off the Disney channel and it even says in the title that is it's name. When I was in elementary school they had a book on the shelf of this movie and it was called The Unidentified Flying Oddball so I thought it must be the name they chose for the book. I noticed they don't even mention it being called A Spaceman in King Arthur's Court, they only say it's other title is The Spaceman and King Arthur so I thought I must be nuts.

The film name theatrically was, 'Unidentified Flying Oddball'. I was 14 at the time and remember riding my bike to the cinema to watch it more than once.

I have a 1979 issue of Future Life magazine (a companion title of Starlog magazine) with an article about the soon to be released movie. It clearly refers to the movie as Unidentified Flying Oddball, so what you remember isn't the original theatrical title, except maybe on a script. The other two English titles came with re-releases, probably because Unidentified Flying Oddball is a little too obscure. It's a fairly clever pun but doesn't give any idea of what the movie is about, hence the more descriptive titles involving King Arthur's name.

Because I remember going to see it more than once in the theater and I had never heard of the King Arthur name for it, it was just Unidentified Flying Oddball.

And I probably would have remembered, since i had read the Twain novel. (Remember the knights on bikes)

This movie has just been shown on UK TV under the 'Unidentified Flying Oddball' title. I usually find that the DVD of any film comes out under it's US release name. But presumably this British-made Disney had a British title. Which I take to be 'The Spaceman and King Arthur.'