Terminal-41 starts incompletely on XO-4, but works on XO-1.75, 13.1.0 build 5

[garycmartin]

Terminal-41 starts incompletely on XO-4, but fine on XO-1.75, 13.1.0 build 5. Perhaps some difference with the VT on this new hardware?

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/sugar3/activity/activity.py", line 538, in __canvas_map_cb
    self.read_file(self._jobject.file_path)
  File "/home/olpc/Activities/Terminal.activity/terminal.py", line 401, in read_file
    self._create_tab(tab_state)
  File "/home/olpc/Activities/Terminal.activity/terminal.py", line 342, in _create_tab
    vt.feed(l + '\r\n')
  File "/usr/lib/python2.7/site-packages/gi/types.py", line 47, in function
    return info.invoke(*args, **kwargs)
TypeError: Item 0: Must be number or single byte string, not unicode