If you have troubles since the update to WordPress 4.5 please read this post before opening a new thread.
Actually I DID clean all caches (at least W3TC told me so). Meanwhile it´s OK at the German website whilst it´s still not working on the Englisch website. Seems like empty the cache does not work 100%
Make sure to clear you *browsers* cache and not just the sites. The browser may have the old font files and be serving them up locally.
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