Comment 10 for bug 187918

   Exactly like Chris Warren described, with me this problem only happens when I authenticate using LDAP (I installed Ldap client using this tutorial: http://ubuntuforums.org/showthread.php?t=597056&highlight=ldap ). I think it is not a authentication problem since I can logon normally using failsafe mode and have rights to all my files at the Ldap server .
Using ssh with -X option I can access the graphical application normally (acroread, skype, firefox, etc).
I'm not a expert user, but can't it be some D-bus read/write access to some file, display or device?
                             Thank you