content: \0a ( i use this for making spaces all the time, instead of just a literal space character) and \bb for my >> markings in lists.
But they could have managed to copy-pasta the character.
I had a page where I used an anchor purely for a hover effect. I wanted to put something cute in the markup and have it show in the address-status bar in the browser, and the image in the anchor was related to the game Duck Hunt. So I thought I'd go to the Wikipedia page about it and copy the Japanese name there-- after all, Wikipedia must be UTF-8 right?
Well it never showed up correctly and I ended up needing to copy the text from a site using the jp character encoding instead. Even though all my stuff is UTF-8 as well and my browser was set to UTF-8.