The only think I can think of is that there is another JSF jar file on you RedHat server that is being used inadvertently. To track this down, add the "-verbose:class" to the JAVA_OPTS in the run script and then examine the locations of the jar files for the classes loaded. You might have to also do this on Windows to have a control group to compare to. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4094241#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...