Can someone please tell me why the servlet header for Jboss 4.2.2 displays that it is tomcat 5.5 and servlet 2.4 when it should be tomcat 6

X-Powered-By: Servlet 2.4; JBoss-4.2.2.GA (build: SVNTag=JBoss_4_2_2_GA date=200710221139)/Tomcat-5.5

Thanks

Dave.