cURL error (60) SSL certificate problem

I'm trying to show and import the latest pictures from a Picasa album using RSS and the Media Feeds module.
But when I import I get the following error.
HRCurlException: cURL error (60) SSL certificate problem, verify that the CA cert is OK

Reading the following article I need to add a certificate so that curl trusts Picasa's rss.
http://unitstep.net/blog/2009/05/05/using-curl-in-php-to-access-https-ss...

Any tips on how to go about this?