title: Correct file upload folder permission
body: <p>In <a href="http://ellislab.com/codeigniter/user-guide/libraries/file_uploading.html" rel="nofollow">CI user guide</a> there is such line:</p>
  
  <blockquote>
    <p>You'll need a destination folder for your uploaded images. Create a
    folder at the root of your CodeIgniter installation called uploads and
    set its file permissions to 777.</p>
  </blockquote>
  
  <p>How secure is it when I am developing real web application? For example: social network and I want to upload user's profile pictures. I think I will have privacy problems when user's will want to upload private pictures.</p>