by Dan Poltawski.
Hi Joseph,
In 2.4+ we have moved to using SSL for retrieving updates to prevent 'Man in the Middle' attacks. The error message you get ('cURL error 60: SSL certificate problem, verify that the CA cert is OK.') is mentioned onhttp://docs.moodle.org/24/en/Automatic_updates_deployment, which links to http://docs.moodle.org/24/en/SSL_certificate_for_moodle.org which outlines the problem and how to resolve it. Hopefully that will help you resolve the problem.
Dan