Arvados

In Rails 3.2.0, a serialized field (like User.prefs) is always written when the field is saved, and the synthetic _changed? method always returns false. See https://github.com/rails/rails/issues/8328 for more context.

This means that User.send_profile_created_notification should never have worked in the first place:

  def send_profile_created_notification
    if self.prefs_changed?
      ...
    end
  end

Check to see if we need to fix this and how.