Traceback (most recent call last):
  File "/usr/lib/pitivi/python/pitivi/ui/timelinecanvas.py", line 246, in _selectionEnd
    self.timeline.setSelectionTo(set(), 0)
  File "/usr/lib/pitivi/python/pitivi/timeline/timeline.py", line 1875, in setSelectionTo
    self.selection.setSelection(selection, mode)
  File "/usr/lib/pitivi/python/pitivi/timeline/timeline.py", line 527, in setSelection
    self.emit("selection-changed")
  File "/usr/lib/pitivi/python/pitivi/signalinterface.py", line 151, in emit
    *args, **kwargs)
  File "/usr/lib/pitivi/python/pitivi/signalinterface.py", line 126, in emit
    res = cb(*ar, **kw)
  File "/usr/lib/pitivi/python/pitivi/timeline/timeline.py", line 1548, in _selectionChanged
    self.emit("selection-changed")
  File "/usr/lib/pitivi/python/pitivi/signalinterface.py", line 151, in emit
    *args, **kwargs)
  File "/usr/lib/pitivi/python/pitivi/signalinterface.py", line 126, in emit
    res = cb(*ar, **kw)
  File "/usr/lib/pitivi/python/pitivi/ui/clipproperties.py", line 612, in _selectionChangedCb
    self.zoom_scale.set_value(1.0)
AttributeError: 'TransformationProperties' object has no attribute 'zoom_scale'