It appears that the issue comes from the fact that the portlet / JSP page uses getContextPath to create the URL. This, in turn, does not trigger the resource processing done in WSRP. The proper solution would be for the portlet to use encodeURL... I understand that this is not an option in many cases so I will implement proper rewriting... http://jira.jboss.com/jira/browse/JBPORTAL-2067 Thanks for your help. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4163536#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...