Description of problem:

After upgrading to Fedora 16 (from 15), it is not possible to start rhythmbox anymore:


[gert@jupiter tmp]$ rhythmbox 
Gtk-Message: Failed to load module "pk-gtk-module"
/usr/lib64/python2.7/site-packages/gobject/constants.py:24: Warning: g_boxed_type_register_static: assertion `g_type_from_name (name) == 0' failed
  import gobject._gobject
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases
**
ERROR:pygobject.c:929:pygobject_new_full: assertion failed: (tp != NULL)
Aborted
[gert@jupiter tmp]$ 

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

2.90.1-17.git20110927.fc16


How reproducible:

On the commandline type "rhythmbox"

Steps to Reproduce:
1. On the commandline type "rhythmbox"
2.
3.
  
Actual results:

Gtk-Message: Failed to load module "pk-gtk-module"
/usr/lib64/python2.7/site-packages/gobject/constants.py:24: Warning: g_boxed_type_register_static: assertion `g_type_from_name (name) == 0' failed
  import gobject._gobject
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases
**
ERROR:pygobject.c:929:pygobject_new_full: assertion failed: (tp != NULL)
Aborted

Expected results:

rhythmbox application started and ready for playing some music.

Additional info: