Which page did you do this on? You might need to use the browser extension for some pages. Some styles do not transfer without it. I can show you what it looks like with my browser extension if you let me know the URL you tried this on?

Not the person you replied to, but it's this article:

http://www.pcgamer.com/why-the-creator-of-dwarf-fortress-is-...

I get similar results when copy&pasting.

This is how it looks with the extension used: https://ctxt.io/2/AAAA4BMMFw

Still needs fixing some image proxying bugs, will work on it, thanks!