Registering client on Satellite fails with "exceptions.KeyError"

Issue

• Registering client on Satellite fails with "exceptions.KeyError". /var/log/up2date file has below information

  [Fri Mar 18 11:13:54 2011] rhn_register
  Traceback (most recent call last):
    File "/usr/sbin/rhn_register", line 79, in ?
      app.run()
    File "/usr/share/rhn/up2date_client/rhncli.py", line 65, in run
      sys.exit(self.main() or 0)
    File "/usr/sbin/rhn_register", line 64, in main
      ui.main()
    File "/usr/share/rhn/up2date_client/tui.py", line 1851, in main
      tui.run()
    File "/usr/share/rhn/up2date_client/tui.py", line 1743, in run
      win = self.windows[index](self.screen, self)
    File "/usr/share/rhn/up2date_client/tui.py", line 1176, in __init__
      key = lambda x: x[0])
    File "/usr/share/rhn/up2date_client/tui.py", line 1176, in <lambda>
      key = lambda x: x[0])
  exceptions.KeyError: 0