Description of problem:
When i try to install OS, using a remote repository on my network, the an 
error message is shown. 

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


How reproducible:
Create a repository, that could be used through the network, on this 
repository is necessary contain all media ISO. Cd1,Cd2,Cd3,Cd4.
Access a machine under test, boot this machine through the network, and start 
installation process.
When OS start to be installed the follow message is shown.
+---------+ Exception Occurred +----------+
|                                         |
| An unhandled exception has            # |
| occurred.  This is most likely a      # |
| bug.  Please copy the full text of    # |
| this exception and file a detailed    # |
| bug report against anaconda at        # |
| http://bugzilla.redhat.com/bugzilla/  # |
|                                       # |
| Traceback (most recent call last):    # |
|   File "/usr/bin/anaconda", line      # |
| 1181, in ?                            # |
|     intf.run(id, dispatch,            # |
| configFileData)                       # |
|                                         |
|      +----+            +-------+        |
|      | OK |            | Debug |        |
|      +----+            +-------+        |
|                                         |
|                                         |
+-----------------------------------------+


Steps to Reproduce:
1.Access the repository through the network
2.Choose Red Hat, and press enter to start installation process.
3.After some minutes the error screen is shown.
  
Actual results:
OS is not installed.

Expected results:
OS could be installed with none error.

Additional info: