Hi, \underbrace is doing strange things. Minimal example: \documentclass{minimal} \usepackage{fontspec} \usepackage{unicode-math} \setmainfont{TeX Gyre Pagella} \setmathfont{Asana Math} \begin{document} \[\underbrace{123}_{456}\] \end{document} Why is that and how to help? ciao Toscho