Anaconda early startup failure - traceback

[whitivery]

We have a working Kickstart server for CentOS 4.4, building
targets running CentOS 4.4.

I built a new server with CentOS 5.3, to build CentOS 5.3
targets, adapting for the changes I noticed as I went along.  The
new server boots and runs but won't build a target unit.

When I PXE-boot a target unit, I get the boot menu and pick an
entry, it starts the early part fine, loads stage2.img OK, shows
a couple screens then a "Retrieving installation information"
dialog/progress bar, and just when/after that gets to 100%, it
halts with a traceback.

I can't tell from the info shown what's wrong.

I simplified the kickstart file a lot, removing custom pre/post
stuff, and it still halts at the same point.

I have placed files and information from /tmp here:

anaconda.log: <http://cos53-ks.pastebin.com/mfafc4f7>
anacdump.txt: <http://cos53-ks.pastebin.com/m3dddc489>
ks.cfg:       <http://cos53-ks.pastebin.com/m376e965c>
syslog:       <http://cos53-ks.pastebin.com/m2d705cf5>
ls -l /tmp:   <http://cos53-ks.pastebin.com/m1491b100>