Dear Mr. Duffner,Thank you very much for your cooperation: since you're a seasoned expert of that issue, my I suggest you get involved in the Liberation fonts: https://bugzilla.redhat.com/show_bug.cgi?id=1009650 where they're experiencing more or less the same problem?
Best wishes, -- /Alessandro Ceschini/ -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex