From Component Showcase's logs:

2009-07-22 18:31:11,146 ERROR [com.icesoft.faces.facelets.D2DFaceletViewHandler] Problem in renderResponse: /WEB-INF/includes/examples/custom/outputMedia.jspx @76,49 source="#{media.source}": Error getting property 'source' from bean of type org.icefaces.application.showcase.view.bean.examples.component.outputMedia.Media: java.lang.NullPointerException
javax.faces.el.EvaluationException: /WEB-INF/includes/examples/custom/outputMedia.jspx @76,49 source="#{media.source}": Error getting property 'source' from bean of type org.icefaces.application.showcase.view.bean.examples.component.outputMedia.Media: java.lang.NullPointerException
        at com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.java:60)
        at com.icesoft.faces.component.outputmedia.OutputMedia.getAttribute(OutputMedia.java:127)
        at com.icesoft.faces.component.outputmedia.OutputMedia.getSource(OutputMedia.java:60)
        at com.icesoft.faces.component.outputmedia.OutputMediaRenderer.encodeEnd(OutputMediaRenderer.java:101)
        at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:740)
        at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:370)
        at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)
        at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:358)
        at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)
        at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:358)
        at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:365)
        at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)
        at com.icesoft.faces.component.util.CustomComponentUtils.renderChild(CustomComponentUtils.java:339)
        at com.icesoft.faces.component.paneltabset.PanelTabSetRenderer.writeTabCell(PanelTabSetRenderer.java:977)
        at com.icesoft.faces.component.paneltabset.PanelTabSetRenderer.encodeEnd(PanelTabSetRenderer.java:423)
        at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:740)
        at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:528)
        at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:522)
        at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:522)
        at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:522)
        at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:522)
        at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:522)
        at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:522)
        at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:522)
        at com.icesoft.faces.facelets.D2DFaceletViewHandler.renderResponse(D2DFaceletViewHandler.java:282)
        at com.icesoft.faces.application.D2DViewHandler.renderView(D2DViewHandler.java:153)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137)
        at com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:19)
        at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle(ReceiveSendUpdates.java:132)
        at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service(ReceiveSendUpdates.java:74)
        at com.icesoft.faces.webapp.http.core.RequestVerifier.service(RequestVerifier.java:28)
        at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:24)
        at com.icesoft.faces.webapp.http.servlet.BasicAdaptingServlet.service(BasicAdaptingServlet.java:16)
        at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
        at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:47)
        at com.icesoft.faces.webapp.http.servlet.SessionVerifier.service(SessionVerifier.java:22)
        at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
        at com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:135)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
        at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:56)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:307)
        at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385)
        at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:748)
        at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:678)
        at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:871)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.NullPointerException
        at org.icefaces.application.showcase.view.bean.examples.component.outputMedia.Media.getSource(Media.java:90)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at com.sun.faces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:99)
        at com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:141)
        at com.sun.el.parser.AstValue.getValue(AstValue.java:96)
        at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:183)
        at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
        at com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.java:56)
        ... 65 more