Third faceted engine throws ClassCastException

java.lang.ClassCastException: org.apache.jackrabbit.core.query.lucene.SearchIndex
at org.hippoecm.repository.FacetedNavigationEngineThirdImpl.view(FacetedNavigationEngineThirdImpl.java:127)
at org.hippoecm.repository.FacetedNavigationEngineThirdImpl.view(FacetedNavigationEngineThirdImpl.java:46)
at org.hippoecm.repository.FacetedNavigationEngineWrapperImpl.view(FacetedNavigationEngineWrapperImpl.java:78)
at org.hippoecm.repository.servicing.ServicingNodeImpl.instantiate(ServicingNodeImpl.java:230)
at org.hippoecm.repository.servicing.ServicingNodeImpl.instantiate(ServicingNodeImpl.java:367)
at org.hippoecm.repository.servicing.ServicingNodeImpl.getNodes(ServicingNodeImpl.java:1146)
at org.apache.jackrabbit.rmi.server.ServerNode.getNodes(ServerNode.java:206)
at java.lang.reflect.Method.invoke(Method.java:585)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:595)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:126)
at org.hippoecm.repository.servicing.server.ServerServicingNode_Stub.getNodes(Unknown Source)
at org.apache.jackrabbit.rmi.client.ClientNode.getNodes(ClientNode.java:236)
at org.hippoecm.frontend.tree.JcrLazyTreeNode.getChildObjectCount(JcrLazyTreeNode.java:32)
at org.hippoecm.frontend.tree.LazyTreeNode.ensureChildCountLoaded(LazyTreeNode.java:129)
at org.hippoecm.frontend.tree.LazyTreeNode.isLeaf(LazyTreeNode.java:211)
at org.apache.wicket.extensions.markup.html.tree.DefaultAbstractTree.newJunctionLink(DefaultAbstractTree.java:402)
at org.apache.wicket.extensions.markup.html.tree.Tree.populateTreeItem(Tree.java:92)
at org.apache.wicket.markup.html.tree.AbstractTree$TreeItem.<init>(AbstractTree.java:118)
at org.apache.wicket.markup.html.tree.AbstractTree.newTreeItem(AbstractTree.java:1339)
at org.apache.wicket.markup.html.tree.AbstractTree.buildTreeItems(AbstractTree.java:1085)
at org.apache.wicket.markup.html.tree.AbstractTree.buildItemChildren(AbstractTree.java:1055)
at org.apache.wicket.markup.html.tree.AbstractTree.updateTree(AbstractTree.java:973)
at org.apache.wicket.extensions.markup.html.tree.DefaultAbstractTree$3.onClick(DefaultAbstractTree.java:419)
at org.apache.wicket.extensions.markup.html.tree.DefaultAbstractTree$6.onClick(DefaultAbstractTree.java:490)
at org.apache.wicket.ajax.markup.html.AjaxLink$1.onEvent(AjaxLink.java:65)
at org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:163)
at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:282)
at org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:100)
at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:90)
at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1048)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1123)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1202)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:489)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:319)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:169)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1040)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:352)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:230)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:627)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:149)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:123)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:141)
at org.mortbay.jetty.Server.handle(Server.java:286)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:444)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:715)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:627)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:203)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:340)
at org.mortbay.jetty.nio.HttpChannelEndPoint.run(HttpChannelEndPoint.java:270)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)