title: uploading files stuck on pending
body: <p>I have a web application running on server 2012 with IIS and php version 5.5.11.</p>
  
  <p>I have a simple form for uploading files to the server</p>
  
  <pre><code>&lt;div class="pdfupload"&gt;
  &lt;h1&gt;upload files&lt;/h1&gt;                   
          &lt;form action="/&lt;?php echo $user?&gt;/upload" method="POST" enctype="multipart/form-data"&gt;
          &lt;input type="file" name="files[]" multiple /&gt;
          &lt;input type="hidden" name="test_id" /&gt;
          &lt;input type="hidden" name="points" /&gt;
          &lt;input class="uploadpdfsubmit" type="submit" value="upload files" /&gt;
      &lt;/form&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>the form worked fine and I was able to upload my files, until a few days ago.
  now only some of the files get uploaded (notepad or empty doc files will upload but pdf or doc with content wont upload)
  its not a size related isuue cause i was able to upload a very big notepad file.</p>
  
  <p>the problem only accurs while im connected to my home network - i tried 3 other networks and there was no problem.</p>
  
  <p>the files that wont upload get stuck on pending - and by going to the network tab in chrome i see that the request isnt created properly. under headers i see a warning sign with Provisional headers are shown.</p>
  
  <p>i have no idea what i causing this strang behavior</p>