mypaint gtk3

MYPAINT_ENABLE_GTK3=1 ./mypaint
1
Using GTK3
builtin python 2.6 json support
DEBUG: getlocale(): ('en_US', 'UTF-8')
DEBUG: localepath:  po
DEBUG: localepath_brushlib:  brushlib/po
confpath = /home/salamanderrake/.mypaint/
DEBUG: mode stack updated: <ModeStack [SwitchableFreehandMode]>
Traceback (most recent call last):
  File "./mypaint", line 199, in <module>
    main.main(datapath, extradata, confpath)
  File "/home/salamanderrake/src/mypaint/head/gui/main.py", line 77, in main
    run()
  File "/home/salamanderrake/src/mypaint/head/gui/main.py", line 52, in run
    app = application.Application(datadir, extradata, options.config, args)
  File "/home/salamanderrake/src/mypaint/head/gui/application.py", line 142, in __init__
    self.drawWindow = self.layout_manager.get_widget_by_role("main-window")
  File "/home/salamanderrake/src/mypaint/head/gui/layout.py", line 98, in get_widget_by_role
    result = self.factory(role, self, *self.factory_opts)
  File "/home/salamanderrake/src/mypaint/head/gui/windowing.py", line 57, in window_factory
    window = module.Window(app)
  File "/home/salamanderrake/src/mypaint/head/gui/drawwindow.py", line 113, in __init__
    layout.MainWindow.__init__(self, lm)
  File "/home/salamanderrake/src/mypaint/head/gui/layout.py", line 373, in __init__
    self.toolbar = None; self.init_toolbar()
  File "/home/salamanderrake/src/mypaint/head/gui/drawwindow.py", line 237, in init_toolbar
    self.toolbar_manager = toolbar.ToolbarManager(self)
  File "/home/salamanderrake/src/mypaint/head/gui/toolbar.py", line 76, in __init__
    self.init_proxies()
  File "/home/salamanderrake/src/mypaint/head/gui/toolbar.py", line 108, in init_proxies
    p.set_app(self.app)
  File "/home/salamanderrake/src/mypaint/head/gui/toolbar.py", line 618, in set_app
    action.connect_proxy(button)
AttributeError: 'ToggleAction' object has no attribute 'connect_proxy'