- The ``pyramid_routesalchemy`` and ``pyramid_alchemy`` scaffolds
  inappropriately used ``DBSession.rollback()`` instead of
  ``transaction.abort()`` in one place.

- Wiki2 (SQLAlchemy + URL Dispatch) tutorial ``models.initialize_sql`` didn't
  match the ``pyramid_routesalchemy`` scaffold function of the same name; it
  didn't get synchronized when it was changed in the scaffold.