Rails - Sep 2005 - Problem with multiple DBs and WEBrick

I''m trying to use two database -- one for each of my (productized)
rails sites
and one shared by all of them (containing domain tables, user tables, etc).  Per
the wiki, I changed environment.rb to:

   site_db = {''development'' =>
{''database'' => SITE, ...}}
   ActiveRecord::Base.configurations = site_db
   ActiveRecord::Base.establish_connection site_db[RAILS_ENV]

   rails_db = {''development'' =>
{''database'' => ''rails'', ...}}
   User.configurations = rails_db
   User.establish_connection rails_db[RAILS_ENV]

Running under WEBrick, this works fine, but only on the first request.  After 
that, I get "Table ''site.users'' doesn''t
exist".  It''s like all configurations
get reset between request.  Or am I doing something wrong?

-- Steve