infinite loop in authlogic rails app

I have a rails app with authlogic and facebook. Shortly after the first time I logged into facebook, all of my pages stopped responding and logs show

Processing UserSessionsController#new (for [IP ADDRESS] at 2010-07-08 00:32:31) [GET]
  Parameters: {"action"=>"new", "controller"=>"user_sessions"}

SystemStackError (stack level too deep):
  (eval):5:in `connection_handler'
  authlogic (2.1.5) lib/authlogic/session/callbacks.rb:83:in `validate'
  authlogic (2.1.5) lib/authlogic/session/validation.rb:64:in `valid?'
  authlogic (2.1.5) lib/authlogic/session/cookies.rb:110:in `persist_by_cookie'
  authlogic (2.1.5) lib/authlogic/session/callbacks.rb:90:in `persist'
  authlogic (2.1.5) lib/authlogic/session/persistence.rb:55:in `persisting?'
  authlogic (2.1.5) lib/authlogic/session/persistence.rb:39:in `find'
  authlogic (2.1.5) lib/authlogic/acts_as_authentic/session_maintenance.rb:96:in `get_session_information'
  authlogic (2.1.5) lib/authlogic/acts_as_authentic/session_maintenance.rb:95:in `each'
  authlogic (2.1.5) lib/authlogic/acts_as_authentic/session_maintenance.rb:95:in `get_session_information'
  authlogic (2.1.5) lib/authlogic/session/callbacks.rb:83:in `validate'
  authlogic (2.1.5) lib/authlogic/session/validation.rb:64:in `valid?'
  authlogic (2.1.5) lib/authlogic/session/cookies.rb:110:in `persist_by_cookie'
  authlogic (2.1.5) lib/authlogic/session/callbacks.rb:90:in `persist'
  authlogic (2.1.5) lib/authlogic/session/persistence.rb:55:in `persisting?'
  authlogic (2.1.5) lib/authlogic/session/persistence.rb:39:in `find'
  authlogic (2.1.5) lib/authlogic/acts_as_authentic/session_maintenance.rb:96:in `get_session_information'
  authlogic (2.1.5) lib/authlogic/acts_as_authentic/session_maintenance.rb:95:in `each'
  authlogic (2.1.5) lib/authlogic/acts_as_authentic/session_maintenance.rb:95:in `get_session_information'

except with a lot more iterations.

Here's my routes.rb:

  map.connect ':controller/:action/:id'
  map.connect ':controller/:action/:id.:format'

  map.resource :account, :controller => "users"
  map.resources :users

  map.resource :user_session
  map.root :controller => "user_sessions", :action => "new" # optional, this just sets the root route

This post hints that setting the persistence token might fix the problem, but that didn't help me. Here's my code for user.rb. It's basically the standard code from the authlogic w/ facebook demo:

class User < ActiveRecord::Base
  is_gravtastic :email, :filetype => :png, :default => "identicon", :size => 120

  validates_uniqueness_of :name, :message => "should be unique!"

  def before_connect(facebook_session)
        logger.info("HEY FACEBOOK, HOW'S IT GOING? SO LOVELY TO SEE: #{facebook_session.user.name}")

        # Authlogic isn't as magic as we thought: tell it we need a persistence token, based on advice
        # in http://github.com/binarylogic/authlogic/issuesearch?state=closed&q=persistence#issue/68
        self.persistence_token = reset_persistence_token
  end

  def before_save
    if self.name.nil? || self.name.blank?
      self.name = "user#{Time.now.to_i}"
    end
  end 


  acts_as_authentic do |c| 
    c.validate_login_field = false
    # optional, but if a user registers by openid, he should at least share his email-address with the app
    c.validate_email_field = false
    c.validate_password_field = false
    # fetch email by ax
    c.openid_required_fields = [:email,"http://axschema.org/contact/email"]
    #c.openid_required_fields = [:language, "http://axschema.org/pref/language"]
  end

  def before_connect(facebook_session)
    self.name = facebook_session.user.name
    self.birthday = facebook_session.user.birthday_date
    self.about = facebook_session.user.about_me
    self.locale = facebook_session.user.locale
    #self.website = facebook_session.user.website
  end



  pri开发者_JAVA百科vate

  def map_openid_registration(registration)

    if registration.empty?
      # no email returned
      self.email_autoset = false
    else
      # email by sreg
      unless registration["email"].nil? && registration["email"].blank?
        self.email = registration["email"]
        self.email_autoset = true
      else
        # email by ax
        unless registration['http://axschema.org/contact/email'].nil? && registration['http://axschema.org/contact/email'].first.blank?
          self.email = registration['http://axschema.org/contact/email'].first
          self.email_autoset = true
        else
          # registration-hash seems to contain information other than the email-address
          self.email_autoset = false
        end
      end
    end

  end

end

Yeah. Any suggestions? Thanks in advance.

More than anything, I'd recommend you get in the habit of making changes one test at a time. That way, you'll know which change caused you problems.