This only happens while on the GroupNavigator. Resize window, see what happens.
com.google.gwt.event.shared.UmbrellaException: Exception caught: Exception caught: Exception caught: invalid value for index: 1
at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:129)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.refresh(ScrollPanelTouchImpl.java:1370)
at com.googlecode.mgwt.ui.client.widget.ScrollPanel.refresh(ScrollPanel.java:177)
at com.googlecode.mgwt.ui.client.widget.Carousel.refresh(Carousel.java:323)
at com.googlecode.mgwt.ui.client.widget.Carousel$4$1.execute(Carousel.java:241)
at com.google.gwt.core.client.impl.SchedulerImpl$Task$.executeScheduled$(SchedulerImpl.java:50)
at com.google.gwt.core.client.impl.SchedulerImpl.runScheduledTasks(SchedulerImpl.java:228)
at com.google.gwt.core.client.impl.SchedulerImpl.flushPostEventPumpCommands(SchedulerImpl.java:388)
at com.google.gwt.core.client.impl.SchedulerImpl$Flusher.execute(SchedulerImpl.java:78)
at com.google.gwt.core.client.impl.SchedulerImpl.execute(SchedulerImpl.java:138)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242)
at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Thread.java:722)
Caused by: com.google.gwt.event.shared.UmbrellaException: Exception caught: Exception caught: invalid value for index: 1
at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:129)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.resetPos(ScrollPanelTouchImpl.java:934)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.startAnimation(ScrollPanelTouchImpl.java:1073)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.access$13(ScrollPanelTouchImpl.java:1065)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl$4.execute(ScrollPanelTouchImpl.java:1109)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.startAnimation(ScrollPanelTouchImpl.java:1125)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.scrollTo(ScrollPanelTouchImpl.java:1398)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.scrollTo(ScrollPanelTouchImpl.java:1376)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.scrollToPage(ScrollPanelTouchImpl.java:1441)
at com.googlecode.mgwt.ui.client.widget.ScrollPanel.scrollToPage(ScrollPanel.java:214)
at com.googlecode.mgwt.ui.client.widget.Carousel$5.onScrollRefresh(Carousel.java:332)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollRefreshEvent.dispatch(ScrollRefreshEvent.java:40)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollRefreshEvent.dispatch(ScrollRefreshEvent.java:1)
at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)
at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40)
at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193)
at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88)
at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.refresh(ScrollPanelTouchImpl.java:1370)
at com.googlecode.mgwt.ui.client.widget.ScrollPanel.refresh(ScrollPanel.java:177)
at com.googlecode.mgwt.ui.client.widget.Carousel.refresh(Carousel.java:323)
at com.googlecode.mgwt.ui.client.widget.Carousel$4$1.execute(Carousel.java:241)
at com.google.gwt.core.client.impl.SchedulerImpl$Task$.executeScheduled$(SchedulerImpl.java:50)
at com.google.gwt.core.client.impl.SchedulerImpl.runScheduledTasks(SchedulerImpl.java:228)
at com.google.gwt.core.client.impl.SchedulerImpl.flushPostEventPumpCommands(SchedulerImpl.java:388)
at com.google.gwt.core.client.impl.SchedulerImpl$Flusher.execute(SchedulerImpl.java:78)
at com.google.gwt.core.client.impl.SchedulerImpl.execute(SchedulerImpl.java:138)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242)
at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Thread.java:722)
Caused by: com.google.gwt.event.shared.UmbrellaException: Exception caught: invalid value for index: 1
at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:129)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
at com.google.gwt.event.logical.shared.SelectionEvent.fire(SelectionEvent.java:43)
at com.googlecode.mgwt.ui.client.widget.Carousel$1.onScrollEnd(Carousel.java:201)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollEndEvent.dispatch(ScrollEndEvent.java:40)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollEndEvent.dispatch(ScrollEndEvent.java:1)
at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)
at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40)
at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193)
at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88)
at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.resetPos(ScrollPanelTouchImpl.java:934)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.startAnimation(ScrollPanelTouchImpl.java:1073)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.access$13(ScrollPanelTouchImpl.java:1065)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl$4.execute(ScrollPanelTouchImpl.java:1109)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.startAnimation(ScrollPanelTouchImpl.java:1125)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.scrollTo(ScrollPanelTouchImpl.java:1398)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.scrollTo(ScrollPanelTouchImpl.java:1376)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.scrollToPage(ScrollPanelTouchImpl.java:1441)
at com.googlecode.mgwt.ui.client.widget.ScrollPanel.scrollToPage(ScrollPanel.java:214)
at com.googlecode.mgwt.ui.client.widget.Carousel$5.onScrollRefresh(Carousel.java:332)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollRefreshEvent.dispatch(ScrollRefreshEvent.java:40)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollRefreshEvent.dispatch(ScrollRefreshEvent.java:1)
at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)
at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40)
at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193)
at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88)
at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.refresh(ScrollPanelTouchImpl.java:1370)
at com.googlecode.mgwt.ui.client.widget.ScrollPanel.refresh(ScrollPanel.java:177)
at com.googlecode.mgwt.ui.client.widget.Carousel.refresh(Carousel.java:323)
at com.googlecode.mgwt.ui.client.widget.Carousel$4$1.execute(Carousel.java:241)
at com.google.gwt.core.client.impl.SchedulerImpl$Task$.executeScheduled$(SchedulerImpl.java:50)
at com.google.gwt.core.client.impl.SchedulerImpl.runScheduledTasks(SchedulerImpl.java:228)
at com.google.gwt.core.client.impl.SchedulerImpl.flushPostEventPumpCommands(SchedulerImpl.java:388)
at com.google.gwt.core.client.impl.SchedulerImpl$Flusher.execute(SchedulerImpl.java:78)
at com.google.gwt.core.client.impl.SchedulerImpl.execute(SchedulerImpl.java:138)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242)
at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.IllegalArgumentException: invalid value for index: 1
at com.googlecode.mgwt.ui.client.widget.Carousel.setSelectedPage(Carousel.java:342)
at ch.sebastienzurfluh.swissmuseum.parcours.client.view.bookletnavigator.InteractiveCarousel.deferedSetSelectedPage(InteractiveCarousel.java:93)
at ch.sebastienzurfluh.swissmuseum.parcours.client.view.bookletnavigator.InteractiveCarousel.access$0(InteractiveCarousel.java:90)
at ch.sebastienzurfluh.swissmuseum.parcours.client.view.bookletnavigator.InteractiveCarousel$1.onSelection(InteractiveCarousel.java:54)
at com.google.gwt.event.logical.shared.SelectionEvent.dispatch(SelectionEvent.java:89)
at com.google.gwt.event.logical.shared.SelectionEvent.dispatch(SelectionEvent.java:1)
at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)
at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40)
at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193)
at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88)
at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
at com.google.gwt.event.logical.shared.SelectionEvent.fire(SelectionEvent.java:43)
at com.googlecode.mgwt.ui.client.widget.Carousel$1.onScrollEnd(Carousel.java:201)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollEndEvent.dispatch(ScrollEndEvent.java:40)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollEndEvent.dispatch(ScrollEndEvent.java:1)
at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)
at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40)
at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193)
at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88)
at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.resetPos(ScrollPanelTouchImpl.java:934)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.startAnimation(ScrollPanelTouchImpl.java:1073)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.access$13(ScrollPanelTouchImpl.java:1065)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl$4.execute(ScrollPanelTouchImpl.java:1109)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.startAnimation(ScrollPanelTouchImpl.java:1125)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.scrollTo(ScrollPanelTouchImpl.java:1398)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.scrollTo(ScrollPanelTouchImpl.java:1376)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.scrollToPage(ScrollPanelTouchImpl.java:1441)
at com.googlecode.mgwt.ui.client.widget.ScrollPanel.scrollToPage(ScrollPanel.java:214)
at com.googlecode.mgwt.ui.client.widget.Carousel$5.onScrollRefresh(Carousel.java:332)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollRefreshEvent.dispatch(ScrollRefreshEvent.java:40)
at com.googlecode.mgwt.ui.client.widget.event.scroll.ScrollRefreshEvent.dispatch(ScrollRefreshEvent.java:1)
at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)
at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40)
at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193)
at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88)
at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
at com.googlecode.mgwt.ui.client.widget.impl.ScrollPanelTouchImpl.refresh(ScrollPanelTouchImpl.java:1370)
at com.googlecode.mgwt.ui.client.widget.ScrollPanel.refresh(ScrollPanel.java:177)
at com.googlecode.mgwt.ui.client.widget.Carousel.refresh(Carousel.java:323)
at com.googlecode.mgwt.ui.client.widget.Carousel$4$1.execute(Carousel.java:241)
at com.google.gwt.core.client.impl.SchedulerImpl$Task$.executeScheduled$(SchedulerImpl.java:50)
at com.google.gwt.core.client.impl.SchedulerImpl.runScheduledTasks(SchedulerImpl.java:228)
at com.google.gwt.core.client.impl.SchedulerImpl.flushPostEventPumpCommands(SchedulerImpl.java:388)
at com.google.gwt.core.client.impl.SchedulerImpl$Flusher.execute(SchedulerImpl.java:78)
at com.google.gwt.core.client.impl.SchedulerImpl.execute(SchedulerImpl.java:138)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242)
at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Thread.java:722)
This only happens while on the GroupNavigator. Resize window, see what happens.