title: "Conversion to Dalvik format failed with error 1" after update to ADT 14
body: <p>After updating to the latest developer tools, ADT 14, my Android project that includes library projects will no longer run producing the error:</p>
  
  <pre><code>Dx UNEXPECTED TOP-LEVEL EXCEPTION: ... already added: ...
  ...
  Conversion to Dalvik format failed with error 1
  </code></pre>
  
  <p>The other threads describing this issue with solutions that include removing and re-adding the projects do not work.</p>