BTW, I don't know if this was mentioned already, but if you're having a problem with diacritic placement due to your fonts not having proper anchor points, you can try using the SIL unicode fonts, which have proper anchor points, as well as a large repertoire of pre-composed glyphs (Charis SIL in particular).
Anyhow, these are the fonts I use most often if I have uncommon diacritics in my document: Charis SIL (derived from Charter) Doulos SIL (matches Times New Roman) Heuristica (derived from Utopia) A lot of OpenType fonts with a "Pro" suffix will also have decent diacritic support, but it really varies from font to font. You might also want to look up \XeTeXinputnormalization on this mailing list. There was a discussion a while back about how it affects diacritic placement (although I think it had more to do with Indic languages rather than IPA). -Andy -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex