I'm using Firefox ESR 17.0.5.

I was looged in with is7 version.
I did upgrade to is8 with rhevm-upgrade tool.
Now I cannot login to "Administrator portal" after upgrade from is7 to is8.
Firefox opens login window and i cannot enter user/password/domain  or press login button.

I can see next message in  /var/log/ovirt-engine/server.log:
2013-08-01 14:57:59,928 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/webadmin]] (ajp-/127.0.0.1:8702-2) Exception while dispatching incoming RPC call: java.lang.SecurityException: Blocked request without GWT base path header (XSRF attack?)
	at com.google.gwt.rpc.server.RpcServlet.getClientOracle(RpcServlet.java:95) [gwt-servlet.jar:]
	at com.google.gwt.rpc.server.RpcServlet.processPost(RpcServlet.java:205) [gwt-servlet.jar:]
	at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) [gwt-servlet.jar:]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:754) [jboss-servlet-api_3.0_spec.jar:1.0.2.Final-redhat-1]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec.jar:1.0.2.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.ovirt.engine.ui.frontend.server.gwt.GwtCachingFilter.doFilter(GwtCachingFilter.java:132) [frontend.jar:]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.ovirt.engine.core.utils.servlet.LocaleFilter.doFilter(LocaleFilter.java:59) [utils.jar:]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web.jar:7.2.0.Final-redhat-8]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.jboss.web.rewrite.RewriteValve.invoke(RewriteValve.java:465) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:488) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:420) [jbossweb.jar:7.2.0.Final-redhat-1]
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920) [jbossweb.jar:7.2.0.Final-redhat-1]
	at java.lang.Thread.run(Thread.java:724) [rt.jar:1.7.0_25]

 (XSRF attack?)
	at com.google.gwt.rpc.server.RpcServlet.getCl