Google Friend Connect API doesn't load HTTPS. There is unfortunately nothing I can do about this. Their API to load API Libraries does support HTTPS, but the API loaded by that library doesn't if that makes any sense. For example the below won't load HTTPS.
google.load( 'friendconnect', '0.8' );
Am reviewing their "autoload" method to see if I can get it to load HTTPS of their sub-libraries for next release.
[UPDATE]: Nope, autoload still loads HTTP and not HTTPS.