If i load web fonts from fonts.com they do not work if i use the recommended JS-Loader. Normally i prefer Typekit, but i need the "Neue Helvetica Condensed" and so i have to use fonts.com.
First i thought the registered Domain or my IP-Address is the reason this didn't work (local development), but there may be a problem only with the JS-Integration. After an hour of testing i found out the CSS-Integration works fine.
Do you mind sharing the URL where the implementation is not working? We'll take a look at it for you.
Fonts.com Web Fonts Support