I ended up going back to PostgreSQL 8.3 as well. Actually, I re-
installed Karmic and then installed PostgreSQL 8.3. For some reason,
uninstalling 8.4 and then installing 8.3 didn't work.
I put the modified script on Pastebin in case it helps out anybody
else:
http://pastebin.com/f3f292e7b
It's very slick to be able to get GeoDjango up and running with just a
handful of commands. Takes about 10 minutes.
Dave