title: OmniAuth invalid_response with Twitter
body: <p>Using OmniAuth, Rails 3.1.0.rc2, mysql2, ruby 1.9.2.p0. </p>
  
  <p>I still get this when redirecting back to my site. </p>
  
  <pre><code>/auth/failure?message=invalid_response
  </code></pre>
  
  <p>Omniauth.rb</p>
  
  <pre><code>Rails.application.config.middleware.use OmniAuth::Builder do
    provider :twitter, 'XXXXX', 'XXXXXXXXXXXXX'
  </code></pre>
  
  <p>I've checked the keys 100x and they are correct. Still getting the invalid response. Any of the questions I see don't seem to work.</p>
  
  <p>Any help would be greatly appreciated!</p>
  
  <p>Thanks. [:</p>
  
  <p>If any new information is needed, just ask.</p>