This one also bit me. I thought I had set up LDAP incorrectly, because the timeout values seemed to be cycling (in retrospect, this is probably due to having more than one nonexistent group).
** Bug 64307 has been marked a duplicate of this bug -- 40-permissions.rules includes non-existent groups https://launchpad.net/bugs/38203 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
