I've posted a more detailed problem description here for your perusal. Problem: It's impossible to login or create new users. The superadmin account does not work. Logging in with superadmin does not give any "wrong password/wrong username" messages, but the log-in still fails, since the log-in link remains in the upper -right corner. Clearing cookies at the browser does not help. I tried using postgresql instead, with identical results. If I import the default wiki xar, the administration link in the upper right hand disappears. Logging in remains impossible. Installation steps taken so far: Container installation: Download Tomcat 6.0.16 extract said container to /opt/apache-tomcat-6.0.16/ Download xwiki-enterprise-1.2.1 war. Extract war into webapps. Setup mysql mysql -u root -e "create database xwiki" mysql -u root -e "grant all privileges on xwiki.* to xwiki@127.0.0.1 identified by 'xwiki'" Download mysql connector jar into WEB-INF/lib uncomment mysql section from hibernate config uncomment superadmin line from xwiki.cfg run /opt/apache-tomcat-6.0.16/bin/startup.sh Logfile output follows. I can find nothing of interest in these. catalina.out: Feb 8, 2008 10:00:07 PM org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/lib64/jvm/java-1_5_0-ibm-1.5.0_sr3/jre/bin: /usr/lib64/jvm/java-1_5_0-ibm-1.5.0_sr3/jre/bin:/usr/lib64/jvm/java-1_5_0-ibm-1.5.0_sr3/jre/bin/classic:/usr/lib64/jvm/java-1_5_0-ibm-1.5.0_sr3/jre/bin:/usr/lib Feb 8, 2008 10:00:08 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on http-8085 Feb 8, 2008 10:00:08 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 752 ms Feb 8, 2008 10:00:08 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Feb 8, 2008 10:00:08 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/6.0.16 Feb 8, 2008 10:00:08 PM org.apache.catalina.startup.HostConfig deployWAR INFO: Deploying web application archive xwiki-enterprise-web-1.2.1.war Feb 8, 2008 10:00:08 PM org.apache.catalina.core.StandardContext addApplicationListener INFO: The listener "com.xpn.xwiki.web.InitializationServletContextListener" is already configured for this context. The duplicate definition has been ignored. Feb 8, 2008 10:00:08 PM org.apache.catalina.core.StandardContext addApplicationListener INFO: The listener "org.xwiki.plexus.XWikiPlexusServletContextListener" is already configured for this context. The duplicate definition has been ignored. Feb 8, 2008 10:00:10 PM org.apache.catalina.core.StandardContext addApplicationListener INFO: The listener "listeners.ContextListener" is already configured for this context. The duplicate definition has been ignored. Feb 8, 2008 10:00:10 PM org.apache.catalina.core.StandardContext addApplicationListener INFO: The listener "listeners.SessionListener" is already configured for this context. The duplicate definition has been ignored. Feb 8, 2008 10:00:11 PM org.apache.catalina.core.StandardContext addApplicationListener INFO: The listener "com.xpn.xwiki.web.InitializationServletContextListener" is already configured for this context. The duplicate definition has been ignored. Feb 8, 2008 10:00:11 PM org.apache.catalina.core.StandardContext addApplicationListener INFO: The listener "org.xwiki.plexus.XWikiPlexusServletContextListener" is already configured for this context. The duplicate definition has been ignored. Feb 8, 2008 10:00:12 PM org.apache.catalina.core.StandardContext addApplicationListener INFO: The listener "com.xpn.xwiki.web.InitializationServletContextListener" is already configured for this context. The duplicate definition has been ignored. Feb 8, 2008 10:00:12 PM org.apache.catalina.core.StandardContext addApplicationListener INFO: The listener "org.xwiki.plexus.XWikiPlexusServletContextListener" is already configured for this context. The duplicate definition has been ignored. Feb 8, 2008 10:00:13 PM org.apache.coyote.http11.Http11Protocol start INFO: Starting Coyote HTTP/1.1 on http-8085 Feb 8, 2008 10:00:13 PM org.apache.jk.common.ChannelSocket init INFO: JK: ajp13 listening on /0.0.0.0:8009 Feb 8, 2008 10:00:13 PM org.apache.jk.server.JkMain start INFO: Jk running ID=0 time=0/14 config=null Feb 8, 2008 10:00:13 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5140 ms 2008-02-08 22:00:50,032 [http://www.example.net:8085/xwiki/bin/view/Main/] [http-8085-1] INFO .AbstractXWikiMigrationManager - No storage migration required since current version is [6431] !remember-me cookie validation hash mismatch! !remember-me cookie has been tampered with! !remember-me cookie is being deleted! !remember-me cookie validation hash mismatch! !remember-me cookie has been tampered with! !remember-me cookie is being deleted! !remember-me cookie validation hash mismatch! !remember-me cookie has been tampered with! !remember-me cookie is being deleted! !remember-me cookie validation hash mismatch! !remember-me cookie has been tampered with! !remember-me cookie is being deleted! Feb 8, 2008 10:01:55 PM org.apache.tomcat.util.http.Parameters processParameters WARNING: Parameters: Invalid chunk ignored. 2008-02-08 22:02:10,319 [http://www.example.net:8085/xwiki/bin/admin/XWiki/XWikiPreferences?editor=globalrights&global=1] [http-8085-4] WARN doc.XWikiDocument - Failed to display field [content] in [view] mode for Object [XWiki.XWikiPreferences] 2008-02-08 22:02:10,320 [http://www.example.net:8085/xwiki/bin/admin/XWiki/XWikiPreferences?editor=globalrights&global=1] [http-8085-4] WARN doc.XWikiDocument - Failed to display field [content] in [view] mode for Object [XWiki.XWikiPreferences] 2008-02-08 22:02:10,321 [http://www.example.net:8085/xwiki/bin/admin/XWiki/XWikiPreferences?editor=globalrights&global=1] [http-8085-4] WARN doc.XWikiDocument - Failed to display field [content] in [view] mode for Object [XWiki.XWikiPreferences] !remember-me cookie validation hash mismatch! !remember-me cookie has been tampered with! !remember-me cookie is being deleted! !remember-me cookie validation hash mismatch! !remember-me cookie has been tampered with! !remember-me cookie is being deleted! localhost.log: Feb 8, 2008 10:00:09 PM org.apache.catalina.core.ApplicationContext log INFO: Loading plexus context properties from: '/WEB-INF/plexus.properties' Feb 8, 2008 10:00:09 PM org.apache.catalina.core.ApplicationContext log INFO: Initializing Plexus. Feb 8, 2008 10:00:09 PM org.apache.catalina.core.ApplicationContext log INFO: resource = jndi:/localhost/xwiki-enterprise-web-1.2.1/WEB-INF/plexus.xml Feb 8, 2008 10:00:09 PM org.apache.catalina.core.ApplicationContext log INFO: Plexus initialized. Feb 8, 2008 10:00:10 PM org.apache.catalina.core.ApplicationContext log INFO: ContextListener: contextInitialized() Feb 8, 2008 10:00:10 PM org.apache.catalina.core.ApplicationContext log INFO: SessionListener: contextInitialized() Feb 8, 2008 10:00:11 PM org.apache.catalina.core.ApplicationContext log INFO: Loading plexus context properties from: '/WEB-INF/plexus.properties' Feb 8, 2008 10:00:11 PM org.apache.catalina.core.ApplicationContext log INFO: Initializing Plexus. Feb 8, 2008 10:00:11 PM org.apache.catalina.core.ApplicationContext log INFO: resource = jndi:/localhost/xwiki/WEB-INF/plexus.xml Feb 8, 2008 10:00:11 PM org.apache.catalina.core.ApplicationContext log INFO: Plexus initialized. Feb 8, 2008 10:00:12 PM org.apache.catalina.core.ApplicationContext log INFO: Loading plexus context properties from: '/WEB-INF/plexus.properties' Feb 8, 2008 10:00:12 PM org.apache.catalina.core.ApplicationContext log INFO: Initializing Plexus. Feb 8, 2008 10:00:12 PM org.apache.catalina.core.ApplicationContext log INFO: resource = jndi:/localhost/xwiki2/WEB-INF/plexus.xml Feb 8, 2008 10:00:12 PM org.apache.catalina.core.ApplicationContext log INFO: Plexus initialized. xwiki.log: 2008-02-08 22:00:50,032 [http://www.example.net:8085/xwiki/bin/view/Main/] [http-8085-1] INFO .AbstractXWikiMigrationManager - No storage migration required since current version is [6431] 2008-02-08 22:02:10,319 [http://www.example.net:8085/xwiki/bin/admin/XWiki/XWikiPreferences?editor=globalrights&global=1] [http-8085-4] WARN doc.XWikiDocument - Failed to display field [content] in [view] mode for Object [XWiki.XWikiPreferences] 2008-02-08 22:02:10,320 [http://www.example.net:8085/xwiki/bin/admin/XWiki/XWikiPreferences?editor=globalrights&global=1] [http-8085-4] WARN doc.XWikiDocument - Failed to display field [content] in [view] mode for Object [XWiki.XWikiPreferences] 2008-02-08 22:02:10,321 [http://www.example.net:8085/xwiki/bin/admin/XWiki/XWikiPreferences?editor=globalrights&global=1] [http-8085-4] WARN doc.XWikiDocument - Failed to display field [content] in [view] mode for Object [XWiki.XWikiPreferences]