Page     : /wiki/index.php
Message  : Only variables should be passed by reference
Action   : history
Type     : 2048
File     : /var/www/hosts/mediawiki/mediawiki-1.6.6/includes/Article.php
Line     : 648
Backtrace: 
    Article.loadLastEdit() # line 662, file: /var/www/hosts/mediawiki/mediawiki-1.6.6/includes/Article.php
   Article.getTimestamp() # line 59, file: /var/www/hosts/mediawiki/mediawiki-1.6.6/includes/PageHistory.php
  PageHistory.history() # line 395, file: /var/www/hosts/mediawiki/mediawiki-1.6.6/includes/Wiki.php
 MediaWiki.performAction(Object:OutputPage, Object:Article, Object:Title, Object:User, Object:WebRequest) # line 50, file: /var/www/hosts/mediawiki/mediawiki-1.6.6/includes/Wiki.php
MediaWiki.initialize(Object:Title, Object:OutputPage, Object:User, Object:WebRequest) # line 123, file: /var/www/hosts/mediawiki/mediawiki-1.6.6/index.php