The following error is thrown when trying to use the was built from the Spring Web Flow Tutorial: http://wiki.icefaces.org/display/ICE/Spring+Web+Flow+2

java.lang.UnsupportedOperationException
at javax.faces.context.FacesContext.isReleased(FacesContext.java:609)
at com.sun.faces.context.PartialViewContextImpl.updateFacesContext(PartialViewContextImpl.java:475)
at com.sun.faces.context.PartialViewContextImpl.isAjaxRequest(PartialViewContextImpl.java:108)
at org.icefaces.impl.context.DOMPartialViewContext.isAjaxRequest(DOMPartialViewContext.java:93)
at org.icefaces.impl.context.DOMPartialViewContext.isAjaxRequest(DOMPartialViewContext.java:93)
at javax.faces.context.PartialViewContextWrapper.isAjaxRequest(PartialViewContextWrapper.java:117)
at javax.faces.component.UIViewRoot.getRendersChildren(UIViewRoot.java:1020)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1755)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:401)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at org.springframework.faces.webflow.FlowViewHandler.renderView(FlowViewHandler.java:99)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at org.springframework.faces.webflow.FlowLifecycle.render(FlowLifecycle.java:80)
at org.springframework.faces.webflow.JsfView.render(JsfView.java:90)
at org.springframework.webflow.engine.ViewState.render(ViewState.java:296)
at org.springframework.webflow.engine.ViewState.refresh(ViewState.java:243)
at org.springframework.webflow.engine.ViewState.resume(ViewState.java:221)
at org.springframework.webflow.engine.Flow.resume(Flow.java:545)
at org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:261)
at org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:169)
at org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183)
at org.springframework.faces.webflow.JsfFlowHandlerAdapter.handle(JsfFlowHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)