When I go to a wiki page, and press the Edit button at the bottom of a
page, I get a prompt page that asks me to register a nickname before
the wiki presents me with a page for me to edit.
If instead you go directly to an edit window, then a nickname was
already registered for your brower/profile/desktop combo.
If you get something else, email me at XXXX@XXXXX.COM and we can
discuss how to report the bug.