note 30683 added to ref.session

IS THIS A BUG???!!! I am using php 4.3 with IIS 5.0. Something strange happens with my session. If user clicks on logout or if the session is expired, I can get access to the page by clickng the back button until i get back to the page that posted my authentication, and it will restart a valid session for me. I have nocache set, but it still somehow keeps track of the login data. I am using session_start() and session_destrory(). Is this a bug or am i missing something??? Thanks -- http://www.php.net/manual/en/ref.session.php http://master.php.net/manage/user-notes.php?action=edit+30683 http://master.php.net/manage/user-notes.php?action=delete+30683 http://master.php.net/manage/user-notes.php?action=reject+30683