Strange fallback font behavior on Mac and Windows

On stayinvisible.com, for some reason our font patch is causing Windows and Mac builds to report that they have all the fonts installed, where as Linux the test properly stops detecting fonts after our limit is reached.

This could be because something about TBB is simply causing the fallback fonts on Mac and Windows to be different than what they expect. Possible OS fingerprinting issue, or deeper bug?

In either case, this is not ridiculously serious, but is worth investigating.

Trac:
Username: mt2014