f13 - gdm fails with no user list

[Genes MailLists]

  Fresh install f13 - fully updated.

  As per usual on laptop - i ran

 gconftool-2 --direct --config-source
xml:readwrite:/etc/gconf/gconf.xml.defaults --type bool --set
/apps/gdm/simple-greeter/disable_user_list true


  So that gdm does not present user list to the world.

  Rebooted - gdm screen comes up - background is there - and lower bar
is there.

   The box where I would put username / password is a thin vertical line
1 pixel wide ...it is impossible to login to gdm


    reset to false and restart and its fine again.


  known bug or is there a new way to configure gdm now ?

  thanks.

 gene/