I\'m having an issue with font awesome which is included into a wordpress site. In Firefox and IE the icons won\'t show at all, however in Chrome & Safari it works fine.
If you're like me, modifying a web.config file is something you're not allowed to touch.
Try storing all the font files (.eot, .ttf, etc) into their own local folder, and link to them locally instead of the FontAwesome CDN. Cleared it up in IE and FF for me every time.
@font-face{ font-family:'FontAwesome'; src:url('../_fonts/fontawesome-webfont.eot'); }