users-admin crashed with signal 5 in g_option_context_parse()

[fnu]

Tried to call user-admin within xfce@Xubuntu (Oneiric).

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: gnome-system-tools 2.32.0-0ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-8.10~ppa1-lowlatency 3.0.0
Uname: Linux 3.0.0-8-lowlatency x86_64
Architecture: amd64
Date: Thu Aug 11 14:23:19 2011
ExecutablePath: /usr/bin/users-admin
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110705)
ProcCmdline: users-admin
ProcEnviron:
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
Signal: 5
SourcePackage: gnome-system-tools
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 g_option_context_parse () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 gtk_parse_args () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 gtk_init_check () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 gtk_init () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
Title: users-admin crashed with signal 5 in g_option_context_parse()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare