[Zope-dev] Adding user.

Hi all, I wanted to add a new user to Zope, so I copied it's login name from a document and pasted it into the user add form. That login name included strange characters which I couldn't see. Now I can't remove that user!! I'm using zope-2.6.0. Does version 2.6.1 solve this problem? Any ideas on how to remove that user?? Thank you.