Description of problem:
When selecting DHCP for the add repo network activation, it generates a fatal
error (attached)

Version-Release number of selected component (if applicable):
fc6-pre iso's

How reproducible:
Always

Steps to Reproduce:
1. Go through the partition setup, etc
2. When the step comes, tick "Fedora Extras" to add in
3. Use DHCP to activate the network interface
  
Actual results:
A fatal error is generated

Expected results:
DHCP works

Additional info:
I know it's known not to work, but I though the trace (attached) might help.