Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /var/www/webXXX/html/site/configuration.php:1) in /var/www/webXXX/html/site/libraries/joomla/session/session.php on line 412

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /var/www/webXXX/html/site/configuration.php:1) in /var/www/webXXX/html/site/libraries/joomla/session/session.php on line 412

Warning: Cannot modify header information - headers already sent by (output started at /var/www/webXXX/html/site/configuration.php:1) in /var/www/webXXX/html/site/libraries/joomla/session/session.php on line 415

Lösung:

Das Problem liegt in der "configuration.php". Diese einfach in ASCII hochladen und nicht im Notepad bearbeiten. Ich nutze zum bearbeiten den Dreamweaver, denn der hat einen eingebauten FTP-Client, was das bearbeiten sehr kompfortabel macht.