title: GMail API: Not Found (404) errors when calling retrieving drafts with drafts.get from ids supplied by drafts.list
body: <p>In the Gmail API quite frequently drafts.list will return a draft id
  but when I pass it to drafts.get it returns a 404 error. This is
  repeatable for certain draft ids, I can call drafts.list again and
  they're still there and I can then call drafts.get and get the same
  error again. I can also call messages.get with the given message id
  and get a response as expected and I can see the draft in the gmail client.</p>
  
  <p>Seems to be a bug in the GMail API. Any ideas for workarounds? And does anyone know the right way to report bugs to Google?</p>