active_record_store sessions does not pass a :secret to #protect_from_forgery in Rails 2.0.0 Preview

After switching to active_record_store to host sessions, I now get the following errors:

ActionController::InvalidAuthenticityToken in Pages#edit Showing app/views/pages/edit.html.erb where line #5 raised:

No :secret given to the #protect_from_forgery call. Set that or use a session store capable of generating its own keys (Cookie Session Store).

Extracted source (around line #5):

2: 3: <%= error_messages_for :page %> 4: 5: <% form_for(@page) do |f| %> 6: <p> 7: <b>Name</b><br /> 8: <%= f.text_field :name %>

RAILS_ROOT: C:/www/rails_apps/myapp

Application Trace | Framework Trace | Full Trace c:/www/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3.7707/lib/ action_controller/request_forgery_protection.rb:101:in `form_authenticity_token' (eval):2:in `send' (eval):2:in `form_authenticity_token' app/views/pages/edit.html.erb:5:in `_run_erb_47app47views47pages47edit46html46erb'

Do I need to do something else besides create the database table and uncomment the line in config/environment.rb?