I too can confirm the issue.
I have 3 machines all running completely updated 12.04 Xubuntu.
None show any users.
2 of the machines are upgraded from 11.10 Xubuntu - the other was a clean install of 12.04
This one has also got a 12.04 Ubuntu partition - when this is booted it show's 1 user as expected.
I too can confirm the issue.
I have 3 machines all running completely updated 12.04 Xubuntu.
None show any users.
2 of the machines are upgraded from 11.10 Xubuntu - the other was a clean install of 12.04
This one has also got a 12.04 Ubuntu partition - when this is booted it show's 1 user as expected.