Facelets tab lib not recognised by Eclipse/Tomcat 6

I included this in my index.jsp JSF file:

<%@ taglib prefix="ui" uri="http://java.sun.com/jsf/facelets"%>

and Eclipse underlines the URL, hovering gives this:

Cannot find the tag library descriptor for "http://java.sun.com/jsf/facelets"

Deploying and trying to start Tomcat 6 using the Tomcat plugin causes this:

|STDOUT| 2010-03-03 17:57:29,872 | INFO  | [main]: Serialization provider : class org.apache.myfaces.shared_impl.util.serial.DefaultSerialFactory
    |STDOUT| 2010-03-03 17:57:29,904 | INFO  | [main]: ServletContext 'C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myapp\' initialized.
    |STDOUT| 2010-03-03 17:57:29,904 | INFO  | [main]: Checking for plugins:org.apache.myfaces.FACES_INIT_PLUGINS
    03-Mar-2010 17:57:29 org.apache.catalina.core.StandardContext start
    SEVERE: Error listenerStart
    03-Mar-2010 17:57:29 org.apache.catalina.core.StandardContext start
    SEVERE: Context [/myapp] startup failed due to previous errors

...

03-Mar-2010 17:57:30 com.sun.faces.config.ConfigureListener contextDestroyed
SEVERE: Unexpected exception when attempting to tear down the Mojarra runtime
java.lang.IllegalStateException: Application was not properly initialized at 开发者_Python百科startup, could not find Factory: javax.faces.application.ApplicationFactory
    at javax.faces.FactoryFinder$FactoryManager.getFactory(FactoryFinder.java:804)

My web.xml contains this

<listener>
    <listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>

My face-config.xml contains this

    <application>
    <!-- tell JSF to use Facelets -->
    <view-handler>com.sun.facelets.FaceletViewHandler</view-handler>
</application>

And my application build has the latest JSF 2.0.2 jsf-api.jar and jsf-impl.jar. I've also got MyFaces 1.2.8 and all the latest commons jars. The app was building fine til I upgraded JSF. I would at least expect a run time error but here Eclipse cannot see the taglib. What else could I be missing?

EDIT

For full information - I took out Mojarra and left in Myfaces. This meant I needed to remove this from my web.xml:

<listener>
        <listener-class>com.sun.faces.config.ConfigureListener</listener-class>
    </listener> 

and replace it with the equivalent for myfaces:

<listener>
  <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
</listener>

Thanks

Do not mix JSF 2.0 with JSF pre-2.0. It may lead to unexpected results (like the one above).

Choose a JSF 2.0 implementation (mojarra as it seems) and remove all myfaces and facelets libraries.

Well that's annoying. I read in a couple of places that the new Mojarra release embedded facelets. I added jsf-facelets-1.1.14.jar to my build and it deployed ok.