Description of problem:
In FC6 Prerelease's installer, if you deselect "Office & productivity" and then 
select it again, Anaconda will ask for network connection.

Version-Release number of selected component (if applicable):
11.1.0.102

How reproducible:
Every time. Also happens with other repositories in installer that are offline.

Steps to Reproduce:
1. Start installing.
2. Don't configure the network.
3. Get to repository selection page and select "Software & development".
  
Actual results:
I'm asked for network connectivity.

Expected results:
Installer should be able to proceed with using package repositories that are on 
DVD without network connectivity.

Additional info:
It's logical to ask for network connection when using Fedora Extras, but not 
for Core. I'm pretty sure this is not same bug as mentioned in release 
announcement by Jeremy Katz. I, however, can't verify that because if 
downloaded new installer image I would already be connected, and this wouldn't 
happen.