PHP doesn\'t allow us to send output before sending headers. When done, it produces those warnings. Not sure what you\'re doing with sessions, but if you\'re trying to send output or set cookies before Geeklog sends its headers, you might want to try using PHP\'s output buffering functions: http://us4.php.net/manual/en/ref.outcontrol.php or set output_buffering = On in php.ini. If these don\'t work for you, then make it into a plugin.