After restart, dashboard/builds gives Error 500

I have just restarted my build server, and now, although it appears to
be running builds okay, cruisecontrol now gives an error message on
the dashboard builds page:

HTTP ERROR: 500

INTERNAL_SERVER_ERROR
RequestURI=/dashboard/tab/builds

Caused by:

java.lang.NullPointerException
	at org.apache.xerces.dom.DeepNodeListImpl.nextMatchingElementAfter(Unknown
Source)
	at org.apache.xerces.dom.DeepNodeListImpl.item(Unknown Source)
	at org.apache.xerces.dom.DeepNodeListImpl.getLength(Unknown Source)
	at net.sourceforge.cruisecontrol.dashboard.service.DashboardXmlConfigService.getStoryTrackers(DashboardXmlConfigService.java:111)
	at net.sourceforge.cruisecontrol.dashboard.service.BuildSummaryUIService.transform(BuildSummaryUIService.java:83)
	at net.sourceforge.cruisecontrol.dashboard.service.BuildSummaryUIService.transformWithLevel(BuildSummaryUIService.java:89)
	at net.sourceforge.cruisecontrol.dashboard.service.BuildSummaryUIService.transformWithLevel(BuildSummaryUIService.java:77)
	at net.sourceforge.cruisecontrol.dashboard.web.LatestBuildsListingController.handleTabRequest(LatestBuildsListingController.java:69)
	at net.sourceforge.cruisecontrol.dashboard.tabs.BaseTabController.handleRequest(BaseTabController.java:60)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:858)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:792)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:476)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:431)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:324)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

Any suggestions as to how this can be fixed would be appreciated.

Thanks,

Thad
-- 
Thaddaeus Frogley
Senior Programmer, Climax Games

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