Description of problem:
When I attempt to save a namespace for ccoleman (which has no namespace set yet) I get an "undefined method `index' for nil:NilClass" Rails error.  It was related to something in my session (logging out and in fixed the problem).  I believe that my first attempt to create the namespace was to a domain that was already in use or had an error

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

How reproducible:
Always

Steps to Reproduce:
1. Create new account
2. Attempt to set namespace to something that already exists or has invalid characters
2a. ??? not sure
3. Attempt to create the namespace to something valid
  
Actual results:
Receive a validation error for "undefined method `index' for nil:NilClass" from Rails each time

Expected results:
Able to set namespace after error

Additional info:
Logging out and in fixed the problem.