Is there a way to specify that a lead be assigned to a specific user from within the HTML form by specifying a salesforce userid in addition to the organizationid or must you utilize a Lead Assignment Rule?

After deploying sforce-jsp-samples.war on Tomcat 5.5.17, I received the following error when attempting to run both web2lead.js and leadlist.jsp.  Any ideas?

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org.apache.jasper.JasperException: Unable to compile class for JSP

Generated servlet error:
The return type is incompatible with JspSourceDependent.getDependants()


 org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:802)