Thread:Project:Support desk/$wgGroupPermissions not preventing spammers creating new pages/reply (5)

Another page created by a non "Trustworthy" new member this morning. www.svrwiki.com/Special:RecentChanges. Is this a security hole? Is ours the only wiki affected, or is it a known problem? $wgGroupPermissions doesn't seem to be doing what it's supposed to. It stops me when I try to create a new page with my own dummy non-admin account, but other people are obviously getting round it somehow. Is there another setting I should change?