I recently upgraded from xwiki enterprise 4.4.1 to version 6.1. I am running on Redhat Enterprise 6.3 OS and using tomcat6. I put the new war into place, updated the config files as necessary and then started up. I went through the wizard process for the upgrade and things seem to go fairly well. But after that completed my ldap setup does not seem to be running. I cannot log in with my username and password from ldap. Some of the errors I have been seeing are: 2014-08-14 11:12:32,576 [https://san-xwiki-sb.cscr.hp.com:8443/xwiki/bin/login/XWiki/XWikiLogin?srid…] WARN u.i.x.MyPersistentLoginManager - Login cookie validation hash mismatch! Cookies have been tampered with I am not sure where to go and not finding useful information on the web. A couple of questions if anyone has some good answers: 1. How do you check the ldap settings for xwiki? I have checked and rechecked the ldap settings in my config files but not seeing indications of what wrong. 2. Do the previous credentials that were cached for the users need to be wiped out so when persons log on they come in and register fresh? If so, how? 3. Are there other log files besides the catalina.out file from tomcat that may have information about the issues? 4. Any other suggestions of things to look at or try? I am working this out on my sandbox so I am open to things to try. Thanks. ------------------------------------- Bruce J. Rust