PHP Session.referer in 4.1.2 and earlier

This is an fyi post to those still running 4.1.2 and earlier....too many hours were spent before I finally found the answer. Hopefully someone finds this before duplicating my struggle. At first I thought it was a bug, but it was a configuration setting in php.ini--oh the shame... Are your sessions resetting at weird times after you click a link to your site? Are you missing session data after a successful first initialization? Check the session.referer line in your php.ini. PHP is expecting what comes after the equal sign to be a string, not a 1, 0, On, or Off. CORRECT (disabling feature): Session.referer = ; default is the empty string INCORRECT: Session.referer = 0; invalidates all requests that have a session specified alongside a referer in the request In more detail: http://groups.google.com/groups?q=php+windows+referer+session+bug&hl=en&lr=& ie=UTF8&oe=UTF8&selm=20011205051126.30002.qmail%40php2.chek.com&rnum=1