title: Weird response for controller.request.format.html? in Rails
body: <p>In my main controller, I have this:</p>
  
  <pre><code>class MainController &lt; ApplicationController  
  
    before_filter do |controller|
      logger.info "controller.request.format.html? = #{controller.request.format.html?}"
      logger.info "controller.request.format.fbml? = #{controller.request.format.fbml?}"
      controller.send :login_required if controller.request.format.html?
      controller.send :facebook_auth_required if controller.request.format.fbml?
    end
  </code></pre>
  
  <p>As expected, I get "true" for the ...fbml? line if a request comes from Facebook (my facebooker gem automatically sets the format).  However, I get "5" for the ...html? line if the request comes from Facebook.  Why would a method with a ? ever return a "5"?  Isn't that against Rails conventions?  Also, I think "5" is considered true so this might mess up my filters.  Still looking into that...</p>
  
  <p>Any ideas?</p>