Hi Norbert, this is what I found:
\documentclass{minimal} %\usepackage{textcomp} \usepackage{microtype} \usepackage{siunitx} \begin{document} \SI{1}{\micro\second} \end{document} Then use xelatex. The problem seems to be caused by the use of the ยต character if the microtype package is used but the textcomp package is not. Disabling the microtype package and enabling the textcomp package both fix the problem. It is actually not specific to the qtm font. Regards -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org