Weird Things With Spring, Eclipse and Tomcat?

Everything was working and now an action seemingly still properly configured from a controller is simply ignored?
It's not Spring's or Eclipse's or your sister's fault.
Check you inadvertently didn't start another instance of Tomcat.
That's what happened to me! And I don't have sisters to blame!

JSTL Taglib Declaration

This post is related to web application development with Spring 1.x, JSTL and Tomcat v5.5.x.
Be sure to have this configuration to be able to use JSTL:

web.xml header (remove space after <):

< ?xml version="1.0" encoding="ISO-8859-1"?>

< xmlns="http://java.sun.com/xml/ns/j2ee" 
   xsi="http://www.w3.org/2001/XMLSchema-instance" 
   schemalocation="http://java.sun.com/xml/ns/j2ee   
   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">

Taglib declaration:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>