Some icons are missing after latest theme update

Hi,

After my latest theme update, some icons are missing in my theme (instead, they are displayed as numbers). For example, the arrows in the main navigation menu or the search widget. I tried to reinstall the previous version and it did work, but when I updated then the problem appeared again. Check for yourself in http://www.fefobouvier.com. I already deactivated all my plugins to see if any were causing the problem, but nope. What seems strange to me is that I have another site set up exactly the same way and the other one is working fine.

Please, let me know if you have an idea of what might be causing the trouble.

Thanks,