JSTL examples bug in WSDK 1-3

[webmaster]

I get the following error when trying to use the WSDK 1-3 jstl-examples.war 
for <out> in "general purpose examples".

java.lang.AbstractMethodError: 
javax.servlet.jsp.PageContext.getVariableResolver()Ljavax/servlet/jsp/el/VariableResolver;
        org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:756)
        org.apache.jsp.elsupport.Out_jsp._jspx_meth_c_forEach_0(Out_jsp.java:111)
        org.apache.jsp.elsupport.Out_jsp._jspService(Out_jsp.java:70)
        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:136)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:320)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:293)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

Can anyone tell me what is wrong?  The apparent line where there is 
difficulty in Out.jsp is:
  private boolean _jspx_meth_c_forEach_0(PageContext pageContext)
          throws Throwable {
    JspWriter out = pageContext.getOut();
    //  c:forEach
    org.apache.taglibs.standard.tag.rt.core.ForEachTag 
_jspx_th_c_forEach_0 = (org.apache.taglibs.standard.tag.rt.core.ForEachTag) 
_jspx_tagPool_c_forEach_var_items.get(org.apache.taglibs.standard.tag.rt.core.ForEachTag.class); 

    _jspx_th_c_forEach_0.setPageContext(pageContext);
    _jspx_th_c_forEach_0.setParent(null);
    _jspx_th_c_forEach_0.setVar("customer");
    _jspx_th_c_forEach_0.setItems((java.lang.Object) 
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate("${customers}", 
java.lang.Object.class, (PageContext)pageContext, null, false));

Apparently the method of some class has changed since the last compile, 
making some code a bug.  But what?

Thanks

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