  Fundamental errors exist in the above-mentioned article, which attempts to
justify previous erroneous claims concerning signature change. In the simplest
example, the authors' proposed ``solutions'' do not satisfy the relevant
equation, as may be checked by substitution. These ``solutions'' are also
different to the authors' originally proposed ``solutions'', which also do not
satisfy the equation. The variational equations obtained from the authors'
``actions'' are singular at the change of signature. The authors'
``distributional field equations'' are manifestly ill defined.
