My website uses a rather obscure font that about half the computers can properly read. The font is \"Lucida Console\". On the computers that can\'t read this font, they get
You can also serve that obscure font with your website (if you are legally able to) using @font-face. It's easy and works even in IE6 :).
Read about it here: http://www.miltonbayer.com/font-face/