pages.xml

 <page view-id="/login.xhtml">
 <navigation from-action="#{identity.login}">
 <rule if="#{identity.loggedIn}">
 <redirect view-id="/start.xhtml"/>
 </rule>
 </navigation>
 </page>

 <page view-id="/empty.xhtml">
 <navigation from-action="next">
 <render view-id="/start/home.xhtml"/>
 </navigation>
 </page>

 <page view-id="/start/1.xhtml">
 <navigation from-action="next">
 <render view-id="/start/2.xhtml"/>
 </navigation>
 </page>

start.xhtml

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
 xmlns:s="http://jboss.com/products/seam/taglib"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 xmlns:a4j="https://ajax4jsf.dev.java.net/ajax"
 template="/layout/template.xhtml">

<ui:define name="body">
<f:view>
 <h:outputText value="Welcome, #{identity.username}" rendered="#{identity.loggedIn}"/>
 <h:form>
 <h:panelGrid columns="2">
 <h:outputText value="Type the Text:" />
 <h:inputText value="#{bean.text}">
 <a4j:support event="onkeyup" reRender="repeater" />
 </h:inputText>
 <h:outputText value="Text in the AJAX Response:" />
 <h:outputText id="repeater" value="#{bean.text}" />

 </h:panelGrid>
 <hr />
 <a4j:log />
 <a4j:commandButton value="Next" action="next" reRender="content" />
 <h:panelGroup id="content">
 <a4j:include viewId="/start/empty.xhtml" />
 </h:panelGroup>
 </h:form>
</f:view>
</ui:define>
</ui:composition>

The other referenced xhtml files does not contain anyathingn useful except static text.

My firefox reload the empty.xhtml (he shows the page a little bit moved to the left site)...