Description of problem:
- Upgrade Fedora 20 to kernel 3.13.3 
- Restart
- Try to open nautilus
 
If you do this in a terminal, you get the following msg : 

/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
** Message: pygobject_register_sinkfunc is deprecated (GstObject)
Traceback (most recent call last):
  File "/usr/share/nautilus-python/extensions/arista-nautilus.py", line 38, in <module>
    import nautilus
ImportError: No module named nautilus
Initializing nautilus-image-converter extension
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases
Segmentation fault (core dumped)

Version-Release number of selected component:
nautilus-3.10.1-3.fc20

Additional info:
reporter:       libreport-2.1.12
backtrace_rating: 4
cmdline:        nautilus --new-window /
crash_function: pyg_type_get_bases
executable:     /usr/bin/nautilus
kernel:         3.13.3-201.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 pyg_type_get_bases at pygobject.c:704
 #1 pygobject_new_with_interfaces at pygobject.c:743
 #2 pygobject_lookup_class at pygobject.c:950
 #3 pygobject_new_full at pygobject.c:1006
 #4 nautilus_python_object_get_background_items at nautilus-python-object.c:297
 #5 get_extension_menus at nautilus-window-menus.c:799
 #6 nautilus_window_load_extension_menus at nautilus-window-menus.c:902
 #7 nautilus_window_slot_update_for_new_location at nautilus-window-slot.c:2154
 #8 location_has_really_changed at nautilus-window-slot.c:2382
 #9 view_begin_loading_cb at nautilus-window-slot.c:2303

Potential duplicate: bug 824197