That war file http://maven.exadel.com/org/richfaces/richfaces-demo/3.0.1-SNAPSHOT/richfaces-demo-3.0.1-20070511.001257-47.war doesn't work with Java 1.6 + Tomcat 6.0.10. The error is

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/index_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type javax/el/ExpressionFactory used in the signature
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:274)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause

java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/index_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type javax/el/ExpressionFactory used in the signature
 org.apache.jsp.index_jsp._jspInit(index_jsp.java:22)
 org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52)
 org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:157)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:320)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:803)