Hi Yves (and everyone else)the ucharclasses package is now on CTAN (http://tug.ctan.org/tex-archive/macros/xetex/latex/ucharclasses/), so if you want to see if it breaks in combination with how you use polyglossia, let me know what the result is.
- Mike "Pomax" Kamermans nihongoresources.com -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex