The small caps glyphs are definitely there, but they might only be considered part of the IPA extension range, i.e. they are not intended as small caps for general use. Which seems weird to me. But anyhow, this is a case where a teckit mapping could solve your problem. Or you could file a ticket with the developers.
I can't check the OT features on the font right now on this machine, but if you run otfinfo, it should tell you if the smcp feature is present in the font (although it's not a sure test, considering Charis SIL had, for older versions, the smcp flag, but no actual implementation). -Andy -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex
