Comment 0 for bug 265926

Mailman 2.1.2:

When trying to view private archives using site admin password,
I get Authorization Failed. Debugging shows that SecurityManager.
Authenticate() raises NotAMemberError which breaks out of that
function before all authcontexts are checked.

Workaround is to check for valid user (!= None) when ac == mm_cfg.
AuthUser.

[http://sourceforge.net/tracker/index.php?func=detail&aid=753175&group_id=103&atid=100103]