@cyaris You could try adding this to your site’s .htaccess file:
<FilesMatch "\.(ttf|otf|eot|woff)$">
<IfModule mod_headers.c>
Header set Access-Control-Allow-Origin "*"
</IfModule>
</FilesMatch>
If that doesn’t solve things, feel free to create an admin account for your WordPress site and email the details to nick.cernis [at] copyblogger.com. Happy to take a closer look for you.
@chantilly For your site, clearing the W3 Total Cache caches should fix things for you. (W3 Total Cache is combining all of your site’s CSS into a single file, and this file currently an old version of the plugin stylesheet. It needs to be regenerated by purging the cache in the plugin settings.)