Last modified: 2010-05-15 15:37:51 UTC
In my mediawiki install, after submiting the login form, a banner about cookies disabled was shown. Nevertheless the user was logged in. I found that, when session.auto_start (php.ini) is on, mediawiki is unable to change session_name() (in setup.php) and the cookie checking function fails (because it checks for the cookie with the name when the one in php.ini is used). The solution is to disable session.auto_start in php.ini (this could be checked in the installation script).
*** This bug has been marked as a duplicate of 3990 ***