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Description of problem:
When trying to add a user: 

[root@localhost ~]# system-config-users
/usr/lib/python2.3/site-packages/gtk-2.0/gtk/__init__.py:90:
GtkDeprecationWarning: gtk.mainiteration is deprecated, use
gtk.main_iteration instead
  self.warn(message, DeprecationWarning)
/usr/lib/python2.3/site-packages/gtk-2.0/gtk/__init__.py:90:
GtkDeprecationWarning: gtk.mainloop is deprecated, use gtk.main instead
  self.warn(message, DeprecationWarning)
Traceback (most recent call last):
  File "/usr/share/system-config-users/userWindow.py", line 335, in
on_userWin_ok_button_clicked
    if self.parent.ADMIN.lookupGroupById (userEnt.get
(libuser.GIDNUMBER)[0]) != None:
TypeError: argument 2 must be list, not str

[root@localhost ~]#

firstboot didn't run btw, so it's the first user I try to create

Version-Release number of selected component (if applicable):
system-config-users-1.2.19-1

How reproducible:
Always

Steps to Reproduce:
1. login as root, firstboot couldn't create a user
2. run system-config-users
3. try to create a user
    

Actual Results:  system-config-users hangs

Expected Results:  user should be created

Additional info: