After banging my head on the desk for far longer than I’d like to admin, I finally figured out the really simple reason my installation of a SSL certificate on a Amazon Linux EC2 instance wasn’t working: Apache has a separate config file for SSL information that is not in the standard /etc/httpd/conf/httpd.conf file.
It’s in /etc/httpd/conf.d/ssl.conf.
Many many thanks to http://jafty.com/blog/installing-godaddy-ssl-certificate-on-amazon-ec2/ for pointing me in the right direction!
Also, just as a reminder for myself, if you’re using a GoDaddy-based SSL certificate that has the “bundle.crt” file, use the SSLCACertificateFile not the SSLCertificateChainFile option in the ssl.conf file.