XDMCP broke

[Andrew DeFaria]

The following situation was working:

I have Windows XP running 1.3.22 and XFree85-xser 4.2.0-28. I also have 
another machine with Mandrake 9.1 and had configured it to host XDMCP 
sessions. I created a little script:

rm -rf /tmp/.X11-unix
xdmcp_server=earth

XWin                    \
  -fullscreen           \
  -screen 0 1600 1200   \
  -once                 \
  -query $xdmcp_server  &

When I run this script in the past I would get a fullscreen X server 
running and be presented with a login session. Now it just starts the X 
server and no XDMCP session starts.

Looking over on the Mandrake system I find the following in 
/var/log/mdkkdm.log:

Apr 25 11:49:07 mdkkdm_config[1540] error: Unrecognized section name 
[Desktop0] at /usr/share/config/kdm/kdmrc:1

The beginning of /usr/share/config/kdm/kdmrc looks like:

[root@earth root]# head /usr/share/config/kdm/kdmrc
[Desktop0]
BackgroundMode=Flat
BlendBalance=100
BlendMode=NoBlending
ChangeInterval=60
Color1=33,68,156
Color2=192,192,192
CurrentWallpaper=0
LastChange=0
MinOptimizationDepth=1

Any ideas?