jsf/permalink example fails with "identifier 'blog' resolved to null"

[#|2010-08-30T17:31:10.191+0530|WARNING|glassfish3.1|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=14;_ThreadName=Thread-1;|StandardWrapperValve[Faces Servlet]: PWC1406: Servlet.service() for servlet Faces Servlet threw exception
javax.el.PropertyNotFoundException: /home.xhtml @30,78 listener="#

": Target Unreachable, identifier 'blog' resolved to null
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:104)
at com.sun.faces.facelets.tag.jsf.core.DeclarativeSystemEventListener.processEvent(EventHandler.java:124)
at javax.faces.component.UIComponent$ComponentSystemEventListenerAdapter.processEvent(UIComponent.java:2511)
at javax.faces.event.SystemEvent.processListener(SystemEvent.java:102)
at com.sun.faces.application.ApplicationImpl.processListeners(ApplicationImpl.java:2098)
at com.sun.faces.application.ApplicationImpl.invokeComponentListenersFor(ApplicationImpl.java:2046)
at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:283)
at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:241)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:104)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:135)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:335)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1522)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:824)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:721)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1014)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:220)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:530)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:511)
at java.lang.Thread.run(Thread.java:619)