[1.6.2] cinnamon-settings keyboard changes don't work here

[leigh123linux]

$ cinnamon-settings
/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
Traceback (most recent call last):
File "/usr/share/cinnamon-settings/cinnamon-settings.py", line 2621, in side_view_nav
sidePage.build()
File "/usr/share/cinnamon-settings/cinnamon-settings.py", line 1589, in build
entry_cell.set_property('accel-mode', Gtk.CellRendererAccelMode.MODIFIER_TAP)
AttributeError: type object 'GtkCellRendererAccelMode' has no attribute 'MODIFIER_TAP'