konqueror 2.2.2 and Mailman 2.0.8
(although the error is present with the Red Hat site's mailman v 2.0.1 (hacked)
After entering the correct password, and authenticating, the preceeding error is
returned with konqueror as the browser -- this error is not obtained with
Netscape 4.77 or Mozilla 0.9.2.1
"Error decoding authorization cookie "
Works with the current version.