This is because Junicode does not have precisely the same character set
in all faces. Your heading is looking for bold, and U+1E5B is not
present in bold. As I don't have as much time as I'd like to sync all
the faces, I deal with these issues as they come up. If you like, I'll
add this glyph in the faces where it is missing and send to you off-list.
Peter
On 4/26/10 11:49 AM, TIMOTHY P. LIGHTHISER wrote:
%!TEX TS-program = xelatex
%!TEX encoding = UTF-8 Unicode
\documentclass[a4paper,10pt,draft,twoside]{book}
\usepackage{xltxtra}
\usepackage{lipsum}
\setmainfont[Mapping=tex-text]{Junicode}
\defaultfontfeatures{Mapping=tex-text}
\begin{document}
\tableofcontents
\chapter{Tṛtīyo 'dhyāyaḥ}
Tṛtīyo 'dhyāyaḥ
\lipsum[1-8]
\end{document}
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