What URL causes this error? No developer can troubleshoot a bug if you can't tell them how to reproduce it. https://www.google.com and https://opera.com load without error for me in 23.0.2254.11474
Yes you're right, the problem is that the URL is on a server at home behind a slow connection and I prefer to not post the URL in public.
So I've set up a webserver on a VPS with the same configuration. It uses a self-signed key.
The address is: URL. Opening the page may give a security warning because of the self-signed key.