I have experienced the same thing here:
https://groups.google.com/group/wave-protocol/browse_thread/thread/d9ff0d98eb8975d3

On Nov 13, 10:43 pm, Michael MacFadden <[email protected]>
wrote:
> All,
>
> After checking out a fresh copy of the code, I am seeing a problem with the 
> wave panel.  Simply log in and create a new wave.  Then either refresh the 
> browser, or click on the wave.  A Shiny shows up in the browser and the 
> following stack trace in the console:
>
> SEVERE: Runtime exception in wave bus subscriber
> java.lang.IllegalStateException: Expected deltas starting at version 
> 2:pnlfcnV8EdfBljAduqkJxA129MM=, got 0
>         at 
> com.google.common.base.Preconditions.checkState(Preconditions.java:172)
>         at 
> org.waveprotocol.box.server.frontend.ClientFrontendImpl.waveletUpdate(Clien 
> tFrontendImpl.java:359)
>         at 
> org.waveprotocol.box.server.waveserver.WaveBusDispatcher.waveletUpdate(Wave 
> BusDispatcher.java:48)
>         at 
> org.waveprotocol.box.server.waveserver.WaveServerImpl.submitDelta(WaveServe 
> rImpl.java:625)
>         at 
> org.waveprotocol.box.server.waveserver.WaveServerImpl.submitRequest(WaveSer 
> verImpl.java:400)
>         at 
> org.waveprotocol.box.server.frontend.ClientFrontendImpl.submitRequest(Clien 
> tFrontendImpl.java:253)
>         at 
> org.waveprotocol.box.server.frontend.WaveClientRpcImpl.submit(WaveClientRpc 
> Impl.java:159)
>         at 
> org.waveprotocol.box.server.waveserver.WaveClientRpc$ProtocolWaveClientRpc$ 
> 1.submit(WaveClientRpc.java:4459)
>         at 
> org.waveprotocol.box.server.waveserver.WaveClientRpc$ProtocolWaveClientRpc. 
> callMethod(WaveClientRpc.java:4589)
>         at 
> org.waveprotocol.box.server.rpc.ServerRpcControllerImpl.run(ServerRpcContro 
> llerImpl.java:200)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.j 
> ava:886)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java: 
> 908)
>         at java.lang.Thread.run(Thread.java:680)
>
> If run in OOPHM a similar behavior happens but the following exception is 
> repeated over and over:
>
>     00:04:49.378 [ERROR] Uncaught exception escaped
> java.lang.NullPointerException: null
>         at 
> org.waveprotocol.wave.client.wavepanel.impl.focus.FocusFramePresenter.onIni 
> t(FocusFramePresenter.java:90)
>         at 
> org.waveprotocol.wave.client.wavepanel.impl.WavePanelImpl.fireOnInit(WavePa 
> nelImpl.java:227)
>         at 
> org.waveprotocol.wave.client.wavepanel.impl.WavePanelImpl.init(WavePanelImp 
> l.java:203)
>         at 
> org.waveprotocol.wave.client.StageTwo$DefaultProvider.renderWave(StageTwo.j 
> ava:556)
>         at 
> org.waveprotocol.box.webclient.client.StageTwoProvider.access$4(StageTwoPro 
> vider.java:1)
>         at 
> org.waveprotocol.box.webclient.client.StageTwoProvider$1$1.execute(StageTwo 
> Provider.java:134)
>         at 
> org.waveprotocol.wave.client.concurrencycontrol.WaveChannelBinder.onOpenFin 
> ished(WaveChannelBinder.java:136)
>         at 
> org.waveprotocol.wave.concurrencycontrol.channel.OperationChannelMultiplexe 
> rImpl.maybeOpenFinished(OperationChannelMultiplexerImpl.java:873)
>         at 
> org.waveprotocol.wave.concurrencycontrol.channel.OperationChannelMultiplexe 
> rImpl.access$10(OperationChannelMultiplexerImpl.java:869)
>         at 
> org.waveprotocol.wave.concurrencycontrol.channel.OperationChannelMultiplexe 
> rImpl$3.onOpenFinished(OperationChannelMultiplexerImpl.java:554)
>         at 
> org.waveprotocol.wave.concurrencycontrol.channel.ViewChannelImpl.onUpdate(V 
> iewChannelImpl.java:333)
>         at 
> org.waveprotocol.box.webclient.client.RemoteWaveViewService.onWaveletUpdate 
> (RemoteWaveViewService.java:309)
>         at 
> org.waveprotocol.box.webclient.client.RemoteViewServiceMultiplexer.onWavele 
> tUpdate(RemoteViewServiceMultiplexer.java:106)
>         at 
> org.waveprotocol.box.webclient.client.WaveWebSocketClient.onMessage(WaveWeb 
> SocketClient.java:144)
>         at 
> org.waveprotocol.box.webclient.client.WaveSocketFactory$2$1.onMessage(WaveS 
> ocketFactory.java:104)
>         at 
> com.google.gwt.websockets.client.WebSocket.onMessage(WebSocket.java:84)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:3 9)
>         at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp 
> l.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at 
> com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
>         at 
> com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
>         at 
> com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.jav 
> a:154)
>         at 
> com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingFo 
> rReturn(BrowserChannelServer.java:336)
>         at 
> com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChann 
> elServer.java:217)
>         at 
> com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:12 0)
>         at 
> com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:510)
>         at 
> com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:26 4)
>         at 
> com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.j 
> ava:91)
>         at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
>         at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:214)
>         at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
>         at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp 
> l.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at 
> com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
>         at 
> com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
>         at 
> com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.jav 
> a:154)
>         at 
> com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChanne 
> lServer.java:291)
>         at 
> com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChan 
> nelServer.java:541)
>         at 
> com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java 
> :362)
>         at java.lang.Thread.run(Thread.java:680)
> Does anyone else see this or is it just me?
>
> ~Michael

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