tryton and pygtkcompat
I think there ist something missing with the removal of pygtkcompat. The following grep is true for trunk as well as 5.2.
:~/bin/tryton/tryton-env/tryton$ grep -rn pygtk
tryton/gui/window/view_form/view/list.py:10:from pygtkcompat.generictreemodel import GenericTreeModel
CHANGELOG:34:* Remove pygtkcompat