title: Flask: IOError when saving uploaded files
body: <p>I am learning Flask and am attempting to work through the uploading files pattern documented here: <a href="http://flask.pocoo.org/docs/patterns/fileuploads/" rel="noreferrer">http://flask.pocoo.org/docs/patterns/fileuploads/</a>. I am working in Firefox 12 on Windows 7, and am running my app in debug mode on my local machine.</p>
  
  <p>I am copying the example verbatim, except for the value of the UPLOAD_FOLDER variable, which I have defined as <code>UPLOAD_FOLDER = '/uploads'</code> and have created a directory called "uploads" which is present in the application root (along with the static and template directories).</p>
  
  <p>Upon uploading the file, I am receiving the error: <code>IOError: [Errno 2] No such file or directory: '/uploads\\u.png'</code></p>
  
  <p>Interestingly, if I specify a raw string for the uploads folder which points directly to the uploads directly on my machine like <code>UPLOAD_FOLDER = r'C:\Python27\projects\Flask\myproject\uploads'</code>, everything works just fine.</p>
  
  <p>Am I not specifying the directory in the right way? Should the uploads directory be placed somewhere else?</p>