WP is 3.8 and HTTPS plugin 3.3.6
When setting multiple subdomains for the same domains, it doesn't seem to work, for example:
If we set http://secure.gravatar.com --> http://secure.gravatar.com
http://\d.gravatar.com --> http://secure.gravatar.com
separately, it is working OK, but if we put them together is not taking both. Of course we have https errors because sometimes the gravatars are shown with secure.gravatar.com and sometimes with 0.gravatar.com or similar, so we always get https errors.