Strict Standards: Redefining already defined constructor for class Net_URL in /home/httpd/vhosts/fan-forum.ch/httpdocs/administrator/components/com_sef/sef.class.php on line 618

Error: headers already sent in sef.class.php on line 618.
Stopped at line 887 in joomsef.php: HEADERS ALREADY SENT (200)
URL=http://www.fan-forum.ch/index.php?option=com_content&id=24&task=view&Itemid=336:
OPTION=com_content: