One day later and I got a courteous response which said I should download the latest version and build.

It also said that Phoul’s demo animation may have had some settings changed.  Hmmm.  He didn’t bother to say why.

So I’ll do the updates and try again.  But I can tell you, my first test render looked BAD with the dreaded crawling digital artifacts, or flickering or static.  Whatever you want to call it.  It might be fine for a lowres web copy, but not anything you would want to present to a client.