Hi,

I tried it as well with the same negative result - it does not work.

Steps I did: 

On Tue, Sep 1, 2009 at 1:22 AM, fred smith <fredex@fcshome.stoneham.ma.us> wrote:
On Mon, Aug 31, 2009 at 11:41:28PM +0100, M A Young wrote:
> On Mon, 31 Aug 2009, jaivuk wrote:
>
> >Hello guys,
> >
> >I did not use gdm for some time and now I'm not happy how it looks in
> >Fedora
> >11.
> >First of all - the list of local users is unacceptable from security
> >reasons. Even if it supports such "an " option - how it can be the default
> >one?!
>
> Having the user list on by default makes sense for a home PC that is only
> going to be used by one or two users, and where security is less
> important. There is a disable_user_list gconf option, see
> http://library.gnome.org/admin/gdm/2.26/gdm.html#greeterconfiguration

I just tried this on my F11 laptop, following the web page you suggest,
and I got no change at all in behavior after a reboot,... it still
displays the list of users.

--
---- Fred Smith -- fredex@fcshome.stoneham.ma.us -----------------------------
 "And he will be called Wonderful Counselor, Mighty God, Everlasting Father,
 Prince of Peace. Of the increase of his government there will be no end. He
 will reign on David's throne and over his kingdom, establishing and upholding
     it with justice and righteousness from that time on and forever."
------------------------------- Isaiah 9:7 (niv) ------------------------------