JPython & visad.ss

I've been trying to get JPython running with VisAD. I've tracked down the
problem to an incompatibility between visad.ss.BasicSSCell and
visad.python.JPythonMethods. The latter has addData methods with
ConstantMaps[] arguments, which matches the on-line javadoc help. The former
doesn't. Is visad.ss out of date? I downloaded VisAD only last week.

Steve.