Unable to change UID from users-admin gui

Binary package hint: gnome-system-tools

Changing another user's UID in the users-admin GUI had no effect.
After changing UID and closing, `getent passwd username' still shows original UID.
Reopening "Users and Groups" confirms UID unchanged.

Changes from the CLI worked as expected.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: gnome-system-tools 2.30.0-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.32-24.38-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Aug 4 16:20:38 2010
ExecutablePath: /usr/bin/users-admin
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: gnome-system-tools
XsessionErrors:
 (polkit-gnome-authentication-agent-1:1456): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (users-admin:1542): Liboobs-WARNING **: There was an unknown error communicating asynchronously with the backends: Malformed message was sent
 (gnome-terminal:2031): Gtk-CRITICAL **: gtk_accel_map_unlock_path: assertion `entry != NULL && entry->lock_count > 0' failed
 (users-admin:2080): Liboobs-WARNING **: There was an unknown error communicating asynchronously with the backends: Malformed message was sent
 (users-admin:2227): Liboobs-WARNING **: There was an unknown error communicating asynchronously with the backends: Malformed message was sent