SSL error when testing RSS feed

Hi,

I'm using Atlassian's JIRA bug tracking system for a project I'm working on, and I want to create posts in Wordpress from the RSS feed of bug reports from their website.

I installed the Autoblog plugin, and configured it to pull from the RSS url. I can't share a working URL cause it has my username/password, but here is the URL without the password.

https://thinkingmedia.atlassian.net/sr/jira.issueviews:searchrequest-rss/10700/SearchRequest-10700.xml?tempMax=1000

When I perform the Autoblog test I get a SSL error as follows.

Error: WP HTTP Error: SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

I've checked the cert from that URL and it's fine.

What could be causing this problem?