[lltx] \textit changes font size with LM fonts

[Ulrike Fischer]

Am Tue, 10 May 2011 20:56:25 +0200 schrieb Stephan Hennig:

> Hi,
> 
> I'm observing an odd behaviour with the Latin Modern Roman and Sans
> fonts.  In the attached example the second instance of italic text is
> typeset at a smaller font size than the surrounding text.
> 
> The problems doesn't exhibit with fonts other that LM Roman or LM Sans
> or if either \tableofcontents or \mainmatter is removed.
> 
> Can you reproduce the problem?

Yes. It has obviously to do with the fact that the fonts exist in
more than one size. lualatex reloads the fonts after a newpage and
then sometimes gets the wrong size (I could reproduce it with 10pt
and 12pt class options but not with 11pt).


I suspect a fontspec bug as one can trigger the wrong font size by
using \textsl. (fontspec handles slanted and italic in a specific
way):

\documentclass[12pt]{book}
\usepackage{fontspec}
\setmainfont{Latin Modern Roman}
\newcommand*{\test}{foo  \textit{bar} \textsl{cde} \textit{bar} foo}

\begin{document}
\test
\end{document}

-- 
Ulrike Fischer