Cobbler 2.0.1-1.el4 "dictionary key must be string" while adding an interface

[Andrew Rankin]

Hello -

I've been testing the newest version of Cobbler on EPEL testing
(v2.0.1-1.el4) on our of my clusters, I upgraded the install from
1.6.6.  After a little playing around I was able to get it to
generally work, however I'm getting a "dictionary key must be string"
while adding an interface to a system in the web interface - no issues
adding one in the CLI though.  Now if I add a network interface using
the CLI I'm no longer able to save edits to the system in the web
interface and get the error noted above (presumably because its trying
to save the network settings).

Ideas?

-----------
The system is Centos 4.7 x86_64:

Linux blah.blah.com 2.6.9-78.ELsmp #1 SMP Thu Jul 24 23:54:48 EDT 2008
x86_64 x86_64 x86_64 GNU/Linux

python-2.3.4-14.7.el4
Django-1.1.1-1.el4
httpd-2.0.52-41.ent.2.centos4
cobbler-2.0.1-1.el4
cobbler-web-2.0.1-1.el4
-----------

Thanks,
Andrew