Description of problem:
Fedora 18 64bit live install anaconda installer fails on first screen (language and keyboard selection).

When I start Fedora 18 64bit installed I can't get from first screen, I can scroll all language choices but no matter which one I choose and click on "Continue" button nothing happens.

Logs will be attached.

This is a critical bug because stops installations from Live media...

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


How reproducible:
100%

Steps to Reproduce:
1. Click in Fedora installer
2. Try to click continue
3. Nothing happens
  
Actual results:


Expected results:


Additional info:
[root@localhost ~]# liveinst 
umount: /isodevice: not found
localuser:root being added to access control list
Starting installer, one moment...
anaconda 18.37.11 for Fedora 18 started.
Exception in thread AnaNetworkThread:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/threading.py", line 551, in __bootstrap_inner
    self.run()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 95, in run
    sys.excepthook(*sys.exc_info())
  File "/usr/lib/python2.7/site-packages/meh/handler.py", line 162, in <lambda>
    sys.excepthook = lambda ty, value, tb: self.handleException((ty, value, tb), obj)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/exception.py", line 82, in handleException
    (ty, value, tb), obj)
  File "/usr/lib/python2.7/site-packages/meh/handler.py", line 108, in handleException
    win = self.intf.mainExceptionWindow(str(self.exn), self.exnText)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/__init__.py", line 188, in mainExceptionWindow
    lightbox = AnacondaWidgets.lb_show_over(self._currentAction.window)
AttributeError: 'NoneType' object has no attribute 'window'


(anaconda:2966): Gtk-CRITICAL **: gtk_tree_model_filter_get_path: assertion `GTK_TREE_MODEL_FILTER (model)->priv->stamp == iter->stamp' failed

(anaconda:2966): Gtk-WARNING **: Overriding tab label for notebook
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/__init__.py", line 77, in <lambda>
    self.window.connect("continue-clicked", lambda *args: self._on_continue_clicked(cb))
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/welcome.py", line 287, in _on_continue_clicked
    StandaloneSpoke._on_continue_clicked(self, cb)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/__init__.py", line 73, in _on_continue_clicked
    cb()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/__init__.py", line 234, in _on_continue_clicked
    nextAction = self._instantiateAction(self._actions[1])
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/__init__.py", line 77, in _instantiateAction
    obj = actionClass(self.data, self.storage, self.payload, self.instclass)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/network.py", line 1091, in __init__
    self.network_control_box.hostname = self.data.network.hostname
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/network.py", line 960, in hostname
    self.entry_hostname.set_text(value)
  File "/usr/lib64/python2.7/site-packages/gi/types.py", line 47, in function
    return info.invoke(*args, **kwargs)
TypeError: Argument 1 does not allow None as a value





(anaconda:2966): Gtk-WARNING **: Overriding tab label for notebook
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/__init__.py", line 77, in <lambda>
    self.window.connect("continue-clicked", lambda *args: self._on_continue_clicked(cb))
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/welcome.py", line 287, in _on_continue_clicked
    StandaloneSpoke._on_continue_clicked(self, cb)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/__init__.py", line 73, in _on_continue_clicked
    cb()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/__init__.py", line 234, in _on_continue_clicked
    nextAction = self._instantiateAction(self._actions[1])
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/__init__.py", line 77, in _instantiateAction
    obj = actionClass(self.data, self.storage, self.payload, self.instclass)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/network.py", line 1091, in __init__
    self.network_control_box.hostname = self.data.network.hostname
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/network.py", line 960, in hostname
    self.entry_hostname.set_text(value)
  File "/usr/lib64/python2.7/site-packages/gi/types.py", line 47, in function
    return info.invoke(*args, **kwargs)
TypeError: Argument 1 does not allow None as a value