Rails3 rc env['rack.session.record'] is not initialized in first request

When creating a new session (by accessing the SessionHash), load_session in AbstractStore is not calling get_session anymore (between beta4 and rc), thus the ActiveRecord session record is not instantiated and env['rack.session.record'] is empty.

This is the relevant code in ./actionpack-3.0.0.rc/lib/action_dispatch/middleware/session/abstract_store.rb

        def load_session(env)
          stale_session_check! do
            if sid = current_session_id(env)
              sid, session = get_session(env, sid)
            else
              sid, session = generate_sid, {}
            end
            [sid, session]
          end
        end

Since my session record is a complex model which also implements session-specific behavior I need to access it even if it is a new session.

I see that this change has been made on purpose to lazy-create the record, however it breaks my usage of sessions and I don't see an alternative approach to have a session model (and not only a hash) in my application without duplicating session tables.