gedit, ubuntu 12.10, crash report

** (gedit:20214): WARNING **: GObject.get_data() and set_data() are deprecated. Use normal Python attributes instead
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases
**
ERROR:/build/buildd/pygobject-3.4.0/gi/_gobject/pygobject.c:946:pygobject_new_full: assertion failed: (tp != NULL)