Hi Sergiu, Thanks for taking the time out to look into the issue. I reinstalled the XWiki instance & now have a clean XWiki instance. I checked the xwiki/WEB-INF/lib folder and I see that the JAXB library shipped with XWiki is JAXB2.1 (jaxb-api-2.1, jaxb-fluent-api-2.1.8, jaxb-impl-2.1.10,jaxb-xjc-2.1.8,jaxrpc-api-1.1 & activation-1.1). Tried accessing the URL http://localhost:8080/xwiki/rest/wikis/xwiki/spaces/Main/pages/WebHome directly from the browser. Following is the java.lang.Linkage error that I get: java.lang.LinkageError: JAXB 2.0 API is being loaded from the bootstrap classloader, but this RI (from jar:file:/C:/Tomcat6.0/webapps/xwiki/WEB-INF/lib/jaxb-impl-2.1.10.jar!/com/s un/xml/bind/v2/model/impl/ModelBuilder.class) needs 2.1 API. Use the endorsed directory mechanism to place jaxb-api.jar in the bootstrap classloader. (See http://java.sun.com/j2se/1.5.0/docs/guide/standards/) com.sun.xml.bind.v2.model.impl.ModelBuilder.<clinit>(ModelBuilder.java:173) com.sun.xml.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.j ava:431) com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:288) com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBCon textImpl.java:1111) com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:154) com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:121) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) javax.xml.bind.ContextFinder.newInstance(Unknown Source) javax.xml.bind.ContextFinder.find(Unknown Source) javax.xml.bind.JAXBContext.newInstance(Unknown Source) javax.xml.bind.JAXBContext.newInstance(Unknown Source) org.restlet.ext.jaxrs.internal.provider.AbstractJaxbProvider.getJaxbContext( AbstractJaxbProvider.java:63) org.restlet.ext.jaxrs.internal.provider.AbstractJaxbProvider.marshal(Abstrac tJaxbProvider.java:84) org.restlet.ext.jaxrs.internal.provider.JaxbProvider.writeTo(JaxbProvider.ja va:106) org.restlet.ext.jaxrs.internal.wrappers.provider.SingletonProvider.writeTo(S ingletonProvider.java:335) org.restlet.ext.jaxrs.internal.util.JaxRsOutputRepresentation.write(JaxRsOut putRepresentation.java:105) com.noelios.restlet.http.HttpServerCall.writeResponseBody(HttpServerCall.jav a:492) com.noelios.restlet.http.HttpServerCall.sendResponse(HttpServerCall.java:428 ) com.noelios.restlet.ext.servlet.ServletCall.sendResponse(ServletCall.java:40 7) com.noelios.restlet.http.HttpServerConverter.commit(HttpServerConverter.java :391) com.noelios.restlet.http.HttpServerHelper.handle(HttpServerHelper.java:148) com.noelios.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:881 ) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:117) com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:68) com.xpn.xwiki.web.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFi lter.java:295) com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFi lter.java:112)