[Fedora-xen] anaconda install problems

[Ben]

I'm trying to use the xenguest-install.py script and am running into  
issues. I answer the initial questions and make it to the choice  
where it's asking about text mode vs. VNC. Regardless of which I  
answer, the install bails out like so:

Traceback (most recent call last):
   File "/usr/bin/anaconda", line 1108, in ?
     from yuminstall import YumBackend
   File "/usr/lib/anaconda/yuminstall.py", line 427
     if self.tsInfo.reqmedia = {}:
                             ^
SyntaxError: invalid syntax
install exited abnormally
[snip]
you may safely reboot your system

I don't know much about anaconda, but I do know that I can't find the  
yuminstall.py file anywhere, which I was hoping might help me debug  
things a bit.