trying to load seaside from scratch into Pharo 1.1 or 1.1.1

I get a pristine one-click image for 1.1 or 1.1.1  from the
pharo-project website and do:

Gofer new
     squeaksource: 'MetacelloRepository';
     package: 'ConfigurationOfSeaside';
     load.

ConfigurationOfSeaside load.


an hour or so into the install, I get message:

Error: stream is already in a subclass of WAHtmlDocument.


This is using Mac OS X SnowLeopard.

:-(


Lawson