I'm getting a java.lang.NoSuchMethodError when deploying the xwiki 2.1 war on our tomcat5 server with java 1.5 I've tried xwiki 2.05 but still get the same error message. Is this being caused by a conflict between jar files somewhere? Below is the full stack trace for the error message: 2009-12-21 06:25:37 StandardWrapperValve[action]: Servlet.service() for servlet action threw exception java.lang.NoSuchMethodError: org.w3c.dom.Document.adoptNode(Lorg/w3c/dom/Node;)Lorg/w3c/dom/Node; at org.xwiki.xml.internal.html.DefaultHTMLCleaner.clean(DefaultHTMLCleaner.java:162) at org.xwiki.xml.internal.html.DefaultHTMLCleaner.clean(DefaultHTMLCleaner.java:107) at org.xwiki.xml.internal.html.DefaultHTMLCleaner.initialize(DefaultHTMLCleaner.java:97) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:373) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:328) at org.xwiki.component.embed.EmbeddableComponentManager.initialize(EmbeddableComponentManager.java:304) at org.xwiki.component.embed.EmbeddableComponentManager.lookup(EmbeddableComponentManager.java:109) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:347) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:328) at org.xwiki.component.embed.EmbeddableComponentManager.initialize(EmbeddableComponentManager.java:304) at org.xwiki.component.embed.EmbeddableComponentManager.lookup(EmbeddableComponentManager.java:109) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:347) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:328) at org.xwiki.component.embed.EmbeddableComponentManager.initialize(EmbeddableComponentManager.java:304) at org.xwiki.component.embed.EmbeddableComponentManager.lookup(EmbeddableComponentManager.java:109) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:347) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:328) at org.xwiki.component.embed.EmbeddableComponentManager.initialize(EmbeddableComponentManager.java:304) at org.xwiki.component.embed.EmbeddableComponentManager.initializeList(EmbeddableComponentManager.java:273) at org.xwiki.component.embed.EmbeddableComponentManager.lookupList(EmbeddableComponentManager.java:119) at org.xwiki.component.internal.DefaultComponentManager.lookupList(DefaultComponentManager.java:105) at org.xwiki.velocity.internal.DefaultVelocityContextFactory.createContext(DefaultVelocityContextFactory.java:106) at org.xwiki.velocity.internal.VelocityExecutionContextInitializer.initialize(VelocityExecutionContextInitializer.java:63) at org.xwiki.context.internal.DefaultExecutionContextManager.initialize(DefaultExecutionContextManager.java:78) at org.xwiki.container.servlet.internal.DefaultServletContainerInitializer.initializeRequest(DefaultServletContainerInitializer.java:104) at com.xpn.xwiki.web.XWikiAction.initializeContainerComponent(XWikiAction.java:387) at com.xpn.xwiki.web.XWikiAction.initializeXWikiContext(XWikiAction.java:372) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:112) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at com.xpn.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:152) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:68) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at com.xpn.xwiki.web.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:295) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:112) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929) at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) at java.lang.Thread.run(Thread.java:595) Radek