title: notify_url not working anymore in PayPal
body: <p>I have the following payment form:</p>
  
  <pre><code>&lt;form action="https://www.paypal.com/cgi-bin/webscr" method="post" id="online-store-paypal"&gt;
    &lt;input type="hidden" name="cmd" value="_xclick"&gt;
    &lt;input type="hidden" name="business" value="kae@kvsites.ie"&gt;
    &lt;input type="hidden" name="item_name" value="Purchase made from www.kvsites.ie"&gt;
    &lt;input type="hidden" name="item_number" value="6"&gt;
    &lt;input type="hidden" name="amount" value="1.00"&gt;
    &lt;input type="hidden" name="currency_code" value="EUR"&gt;
    &lt;input type="hidden" name="no_shipping" value="1"&gt;
    &lt;input type="hidden" name="no_note" value="1"&gt;
    &lt;input type="hidden" value="http://www.kvsites.ie/contact-us/Login?onlinestore_iid=6" name="return"&gt;
    &lt;input type="hidden" name="notify_url" value="http://www.kvsites.ie/ww.plugins/online-store/verify/paypal.php"&gt;
    &lt;input type="hidden" name="bn" value="IC_Sample"&gt;
    &lt;input type="image" style="width:68px;height:23px;" src="https://www.paypal.com/en_US/i/btn/x-click-but23.gif" name="submit" alt="Make payments with payPal - it's fast, free and secure!"&gt;
    &lt;img width="1" height="1" alt="" src="https://www.paypal.com/en_US/i/scr/pixel.gif"&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>The relevant line is this:</p>
  
  <pre><code>&lt;input type="hidden" name="notify_url" value="http://www.kvsites.ie/ww.plugins/online-store/verify/paypal.php"&gt;
  </code></pre>
  
  <p>When I access it directly, it (obviously) is registered in my web server's access log.</p>
  
  <p>When I actually /use/ the form, though, the payment goes through successfully, but the IPN does not appear in PayPal's IPN history page, and does not appear in Apache's logs.</p>
  
  <p>This is something that worked perfectly for months, and only recently has stopped working completely.</p>