Page     : /wiki/index.php
Message  : Only variables should be passed by reference
Action   : submit
Type     : 2048
File     : /var/www/hosts/mediawiki/mediawiki-1.6.6/includes/OutputPage.php
Line     : 50
Backtrace: 
 OutputPage.OutputPage() # line 291, file: /var/www/hosts/mediawiki/mediawiki-1.6.6/includes/Setup.php
require_once("/var/www/hosts/mediawiki/mediawiki-1.6.6/includes/Setup.php") # line 80, file: /var/www/hosts/mediawiki/mediawiki-1.6.6/index.php