[XeTeX] corrupted Tibetan font

[Yves Codet]

Hello.

I would like to try a Tibetan font, "Joyig.ttf", included in an  
archive freely downloadable here :

http://www.dit.gov.bt/downloads.php

When I tried to install it through FontBook on OS X, I got a  
warning : this font is corrupted, do not use it. I attach the report  
issued by FontBook in case it may help (sorry, it is in French).

So my questions are: is it really risky to try and use such a font?  
has anybody else used it and what happened? Thanks in advance.

Best wishes,

Yves


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