[XeTeX] Quotes and dashes

[Sasi Kumar]

Although I had written about this problem earlier and got some responses, I
continue to be plagued by the absence of "curly" quotes and mdashes. I am
giving a minimal working example below. It gives a pdf that has rectangles
where I have placed quotes and dashes:

\documentclass[a4paper,12pt]{article}
\usepackage[margin=1in]{geometry}
\usepackage{fontspec}
\usepackage{polyglossia,xltxtra}
\newfontfamily\malayalamfont[Script=Malayalam,Mapping=tex-text]{Rachana}
\setmainfont[Script=Malayalam, HyphenChar="0000, Mapping=tex-text]{Rachana}
\usepackage{xltxtra}
\defaultfontfeatures{Mapping=tex-text}
\setromanfont{FreeSerif}

\usepackage{url}
\headheight=15pt
\usepackage{fancyhdr}
\setdefaultlanguage{malayalam}
\date{}

\begin{document}
(Sir Frederick William Herschel, 1738--1822)

"ഗ്രഹം"

``planet''
\end{document}

Thanks in advance for any solution.

Regards,
Sasi

-- 
V. Sasi Kumar
Free Software Foundation of India
Please see: http://swatantryam.blogspot.com/
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