users-admin hangs immediately when run as root
Binary package hint: gnome-system-tools
When users-admin is run as root, whether by sudo, gksudo, or from a root shell (started with "sudo su"), it hangs. The "busy" mouse pointer (spinny wheel, with the default theme) is shown. The widgets in the window are drawn (though the users list is not populated), but faded out and unusable. It does not monopolize CPU resources in this state. SIGTERM kills it without incident.
This is on a 64-bit Maverick system (with version 2.32.0-0ubuntu1 of gnome-system-
Linux Apok 2.6.35-23-generic #41-Ubuntu SMP Wed Nov 24 11:55:36 UTC 2010 x86_64 GNU/Linux
When run as a non-root user, users-admin works without problems, including when performing tasks requiring it to elevate privileges to root while running (e.g. creating a user). And it works fine when a non-root user runs it as an alternate non-root user.
I have also reproduced this bug on a 32-bit Maverick system, as well as a 32-bit Natty system (same gnome-system-tools package version).
DistroRelease: Ubuntu 10.10
Package: gnome-system-tools 2.32.0-0ubuntu1
Uname: Linux 2.6.35-23-generic x86_64
Date: Sat Dec 4 10:36:40 2010
InstallationMedia: Xubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100406)
PATH=(custom, no user)