When accessing the main page, the user receives the search page instead of the login page. The logout button appears at the upper right-hand corner of the page, which seems to suggest that the browser thinks that the user is already logged in. It's not possible to logout and get the login/logout page. Instead, the search page is formed in the browser. The page that has the button where one may login as Guest has never appeared.
I am using a Mac G5 PPC, OS 10.5.8, WiPhA 2.5, PHP 2.5.4, Aprellium Abyss HTTP Server.