title: Laravel 5 file downloads invalid
body: <p>When using <code>Response::download</code> to download files, I noticed that images and other binary files were being transferred incorrectly. </p>
  
  <p>Changing the <code>Content-Type</code> header didn't change anything, nor did explicitly disallowing cache or forcing the content's length.</p>
  
  <p>What may be the cause of this problem?</p>