Compare plugin throws exception

The compare plugin is throwing an "invalid model" exception:

[INFO] [talledLocalContainer] 15.10.2012 15:13:02 ERROR [org.hippoecm.frontend.editor.viewer.ComparePlugin.createTemplate():108] Unable to open template
[INFO] [talledLocalContainer] org.hippoecm.frontend.editor.TemplateEngineException: Invalid model
[INFO] [talledLocalContainer] at org.hippoecm.frontend.editor.impl.TemplateEngine.getType(TemplateEngine.java:98)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.editor.viewer.ComparePlugin.createTemplate(ComparePlugin.java:84)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.editor.viewer.ComparePlugin.onModelChanged(ComparePlugin.java:76)
[INFO] [talledLocalContainer] at org.apache.wicket.Component.modelChanged(Component.java:2255)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.service.render.AbstractRenderService.onEvent(AbstractRenderService.java:301)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.model.event.ObservableRegistry$ObservationContext.notifyObservers(ObservableRegistry.java:77)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.model.event.JcrEventListener.onEvent(JcrEventListener.java:65)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.observation.JcrListener.process(JcrListener.java:565)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.observation.JcrObservationManager.processEvents(JcrObservationManager.java:282)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.PluginPage.processEvents(PluginPage.java:153)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.PluginRequestCycleProcessor.processEvents(PluginRequestCycleProcessor.java:101)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1252)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestCycle.step(RequestCycle.java:1331)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1438)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestCycle.request(RequestCycle.java:546)
[INFO] [talledLocalContainer] at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
[INFO] [talledLocalContainer] at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:319)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.ResourceRewriteFilter.doFilter(ResourceRewriteFilter.java:129)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.plugins.login.ConcurrentLoginFilter.doFilter(ConcurrentLoginFilter.java:56)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:589)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
[INFO] [talledLocalContainer] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291)
[INFO] [talledLocalContainer] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
[INFO] [talledLocalContainer] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
[INFO] [talledLocalContainer] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
[INFO] [talledLocalContainer] at java.lang.Thread.run(Thread.java:619)
[INFO] [talledLocalContainer] Caused by: javax.jcr.InvalidItemStateException: Item does not exist anymore: 4aaecd06-1ce3-4b98-9ff9-d77e8d0d559a
[INFO] [talledLocalContainer] at org.apache.jackrabbit.core.ItemImpl.itemSanityCheck(ItemImpl.java:116)
[INFO] [talledLocalContainer] at org.apache.jackrabbit.core.ItemImpl.perform(ItemImpl.java:90)
[INFO] [talledLocalContainer] at org.apache.jackrabbit.core.ItemImpl.getPath(ItemImpl.java:376)
[INFO] [talledLocalContainer] at org.hippoecm.repository.decorating.ItemDecorator.getPath(ItemDecorator.java:91)
[INFO] [talledLocalContainer] at org.hippoecm.repository.decorating.checked.ItemDecorator.getPath(ItemDecorator.java:92)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.editor.impl.TemplateEngine.getType(TemplateEngine.java:79)
[INFO] [talledLocalContainer] ... 35 more

Reproduction path:

1. Create a document with a rich-text editor field
2. Add an image to the rich-text field
3. Save, close and publish the document
4. Edit the document, add an internal link to the image
5. Save and close