wiithon crashes on start

[jmacedo]

Buenos días .
La primera vez inició sin problemas pera la sengunda ya da estos problemas.
Adjunto el trace

Gracias

Traceback (most recent call last):
  File "/usr/games/wiithon", line 138, in <module>
    App()
  File "/usr/games/wiithon", line 48, in App
    prefs.cargarPreferenciasPorDefecto()
  File "/usr/share/wiithon/preferencias.py", line 53, in cargarPreferenciasPorDefecto
    self.iniciarPreferencia('string', 'device_seleccionado')
  File "/usr/share/wiithon/preferencias.py", line 283, in iniciarPreferencia
    preferencia = session.query(Preferencia).filter(sql).first()
  File "<string>", line 2, in filter
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/base.py", line 220, in generate
    fn(self, *args[1:], **kw)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 1789, in filter
    criterion = expression._expression_literal_as_text(criterion)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/elements.py", line 4556, in _expression_literal_as_text
    return _literal_as_text(element)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/elements.py", line 4579, in _literal_as_text
    return _literal_as(element, _no_text_coercion)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/elements.py", line 4565, in _literal_as
    return text_fallback(element)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/elements.py", line 4609, in _no_text_coercion
    "extra": "%s " % extra if extra else "",
sqlalchemy.exc.ArgumentError: Textual SQL expression u"preferencias.campo=='devi..." should be explicitly declared as text(u"preferencias.campo=='devi...")