title: Paypal IPN: certificate verify failed
body: <p>Since yesterday I'm unable to receive paypal ipn notifications. I've check the log file and the error is:</p>
  
  <pre><code>[24-Mar-2015 13:48:44] cURL error: [60] SSL certificate problem, verify that the CA cert is OK. Details:
  error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
  </code></pre>
  
  <p>Any thoughts ?</p>