title: "Page not found" all over the place with i18n on Drupal?
body: <p>I am clearly missing the picture here as just about everything I try is just failing miserably. I have languages as follows:</p>
  
  <pre><code>gb-en - UK English (path = /gb/en/about )
  us-en - US English (path = /us/en/about )
  us-es - US Spanish (path = /us/es/about )
  </code></pre>
  
  <p>I have an about page located at /about. If I translate and assign the links above, two things go wrong:</p>
  
  <ol>
  <li>If I go to the translate page, and say I want to translate it to "US-ES", then the link becomes: 
  us/es/node/add/page?translation=6&amp;target=us-es --> which does not exist (page not found)</li>
  <li>If I add the language switcher, and switch to the US-ES page that it has found, it also says "page not found".</li>
  </ol>
  
  <p>Something is causing everything to say "page not found" and I have fiddled with just about everything in the settings and it just doesn't work.</p>
  
  <p>What am I missing?</p>
  
  <p>Could it perhaps be because I am using prefixes with slashes? I.e. us/en and us/es etc?</p>