title: I get "Session Expired" when logging in to our site
body: <p>Sorry for double posting probably same question but I don't think I've explained the question much on the previous one. Here's an easier to understand question:</p>
  
  <p>The site I'm working on uses Devise (https://github.com/plataformatec/devise/) and Omniauth (https://github.com/intridea/omniauth) to allow users to logon via Twitter. It works well when it's used in browsers.</p>
  
  <p>This is how to reproduce the problem:</p>
  
  <ol>
  <li>User is using Twitter's IOS app</li>
  <li>User clicks on a link of our site that was embedded in a tweet</li>
  <li>Twitter opens our site via UIWebView</li>
  <li>Our site requires the user to login via Twitter</li>
  <li>The app executes Safari and redirects to Twitter's login portal, prompting the user to login</li>
  <li>When the users submits the form, it redirects him back to our site and throws an error: "Session Expired"</li>
  </ol>
  
  <p>Any ideas why this is happening? Or anyone experiencing the same problem?</p>