> characters long that contains _only_ letters and/or numbers.  No special
> characters at all.  In the case of ^[a-zA-Z0-9]{6,20}$ it allows special
> characters once it finds at least 6 letters and/or numbers.  It's that
> "only" part that is giving me trouble.

Um.  No, it shouldn't.  I doesn't allow anything between the last
character matched by the class and the end of the string.

Are you actually seeing this behavior?

--Ben
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