I had the same issue. I successfully resolved it by changing the line 2212 of /usr/share/phpbb3/www/includes/functions.php from if (FALSE && $admin) # Debian/Thijs Kinkhorst: disable because this does not work to if ($admin) I guess the 020_temp_ignore_admin_sessionkey.diff patch should not be applied in the future.
Good luck, best regards Marc-Etienne -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]