Event rendering number format exception causes 500 error page

When using the new event logger in 7.6 the following error occurs:

02.05.2012 13:25:25 ERROR [org.apache.wicket.RequestCycle.logRuntimeException():1531] Error attaching this container for rendering: [MarkupContainer [Component id = extensio
n.currentActivity]]
org.apache.wicket.WicketRuntimeException: Error attaching this container for rendering: [MarkupContainer [Component id = extension.currentActivity]]
at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1789)
at org.apache.wicket.Component.onBeforeRender(Component.java:4004)
at org.hippoecm.frontend.service.render.AbstractRenderService.onBeforeRender(AbstractRenderService.java:495)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1069)
at org.apache.wicket.Component.beforeRender(Component.java:1103)
at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1777)
at org.apache.wicket.Component.onBeforeRender(Component.java:4004)
at org.hippoecm.frontend.service.render.AbstractRenderService.onBeforeRender(AbstractRenderService.java:495)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1069)
at org.apache.wicket.Component.beforeRender(Component.java:1103)
at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1777)
at org.apache.wicket.Component.onBeforeRender(Component.java:4004)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1069)
at org.apache.wicket.Component.beforeRender(Component.java:1103)
at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1777)
at org.apache.wicket.Component.onBeforeRender(Component.java:4004)
at org.hippoecm.frontend.plugins.standards.tabs.TabbedPanel.onBeforeRender(TabbedPanel.java:335)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1069)
at org.apache.wicket.Component.beforeRender(Component.java:1103)
at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1777)
at org.apache.wicket.Component.onBeforeRender(Component.java:4004)
at org.hippoecm.frontend.service.render.AbstractRenderService.onBeforeRender(AbstractRenderService.java:495)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1069)
at org.apache.wicket.Component.beforeRender(Component.java:1103)
at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1777)
at org.apache.wicket.Component.onBeforeRender(Component.java:4004)
at org.apache.wicket.Page.onBeforeRender(Page.java:1550)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1069)
at org.apache.wicket.Component.beforeRender(Component.java:1103)
at org.apache.wicket.Component.prepareForRender(Component.java:2295)
at org.apache.wicket.Page.prepareForRender(Page.java:1540)
at org.apache.wicket.Component.prepareForRender(Component.java:2332)
at org.apache.wicket.Page.renderPage(Page.java:911)
at org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.respond(BookmarkablePageRequestTarget.java:261)
at org.apache.wicket.request.AbstractRequestCycleProcessor.respond(AbstractRequestCycleProcessor.java:105)
at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1260)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1331)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1438)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:546)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:319)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.hippoecm.frontend.ResourceRewriteFilter.doFilter(ResourceRewriteFilter.java:129)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.hippoecm.frontend.plugins.login.ConcurrentLoginFilter.doFilter(ConcurrentLoginFilter.java:54)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:470)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:396)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NumberFormatException: For input string: "k"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Long.parseLong(Long.java:464)
at java.lang.Long.parseLong(Long.java:522)
at org.hippoecm.frontend.plugins.cms.dashboard.EventModel.<init>(EventModel.java:67)
at org.hippoecm.frontend.plugins.cms.dashboard.current.CurrentActivityPlugin$CurrentActivityView.populateItem(CurrentActivityPlugin.java:117)
at org.apache.wicket.markup.repeater.RefreshingView$1.newItem(RefreshingView.java:114)
at org.apache.wicket.markup.repeater.DefaultItemReuseStrategy$1.next(DefaultItemReuseStrategy.java:71)
at org.apache.wicket.markup.repeater.DefaultItemReuseStrategy$1.next(DefaultItemReuseStrategy.java:68)
at org.apache.wicket.markup.repeater.RefreshingView.addItems(RefreshingView.java:189)
at org.apache.wicket.markup.repeater.RefreshingView.onPopulate(RefreshingView.java:98)
at org.apache.wicket.markup.repeater.AbstractRepeater.onBeforeRender(AbstractRepeater.java:131)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1069)
at org.apache.wicket.Component.beforeRender(Component.java:1103)
at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1777)
... 61 more