The clue is in the comment that appears before the injection of the portal-identity/style.css: <!-- insert header content that was possibly set by portlets on the page --> Examining portal-identity.sar, in portal-identity.war/WEB-INF/jboss-portlet.xml, you find these lines (twice): <header-content> | <link rel="stylesheet" type="text/css" href="/style.css" media="screen"/> | </header-content> | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4125653#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...