I have installed the exo stack bundled in tomcat 5.0 (linux FC5 env.) and the wiki.war (xwiki-exo-0.9.1252) I have the following exception when launching xwiki as stand alone: javax.servlet.ServletException: L'ex�cution de la servlet a lanc� une exception com.xpn.xwiki.user.impl.exo.ExoFilter.doFilter(ExoFilter.java:50) com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:127) Any idea ?