I also confirm that this is a problem. I thought I was just ignorant and opened a support case for it: https://launchpad.net/distros/ubuntu/+ticket/2441 where I got no success so far. The workaround above is not very userfriendly so I figure it is a bug or a re-feature request for feisty.
-- [users-admin] show all users checkbox is gone and there is no way to view users with a UID of less than 1000 https://launchpad.net/bugs/70850 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
