DeliciousCake
Smash Lord
It's called the Zero-Width Non-Joiner character.I see a bunch of weird characters that look nothing like Arabic. In fact, it looks like a 2x2 matrix with the first row being "0 0" and the second row being "9 0". I'm using Firefox 3.0.5 with pretty much all language support installed and honestly have no clue where that character comes from. I always wondered why your swear words had weird characters in them.
http://en.wikipedia.org/wiki/Zero-width_non-joiner