title: Fontello Glyph Font odd behaviour on Firefox, shows unicode codes instead of icons
body: <p>I have a webpage.
  In its upper right corner I have some social icons. It shows okay in Chrome (both local and on the webserver), it shows <strong>ok</strong> in local FF, but on the <strong>online</strong> page I see the square placeholders with the Unicode codes inside.</p>
  
  <p>Oddly enough, if i open Firebug and correct the fontello.css on the fly via <em>Source Edit</em>, the icons appear magically, or so it seems, and this even with trivial corrections like adding and then removing a whitespace.</p>
  
  <p>This is really puzzling me. Any suggestions?</p>