[OS X TeX] --- .neq m-dash

[Michael Kubovy]

Dear TeXers,

With the following preamble
%%!TEX TS-program = xelatexmk
%%!TEX encoding = UTF-8 Unicode

\documentclass[twocolumn,11pt]{article}
\usepackage[pdftitle={Gestalt  
Detection},colorlinks=true,linkcolor=blue]{hyperref}
\usepackage{graphicx}
\usepackage[hang,small,sc]{caption}
\usepackage{amssymb}
\usepackage{amsmath} %
\usepackage{fancyhdr}
\usepackage{xspace}
\usepackage{tabularx}
\usepackage{apacite}
\usepackage[left=.5in, right = .5in, top=.6in, bottom = .6in]{geometry}
\usepackage{subfigure}
\usepackage{sectsty}
\usepackage[cm-default]{fontspec}
\setmainfont{Palatino}
\allsectionsfont{\sffamily\mdseries\upshape}
\pagestyle{fancy}

--- shows up as --- instead of an m-dash

Any suggestions?
_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS:     P.O.Box 400400    Charlottesville, VA 22904-4400
Parcels:    Room 102        Gilmer Hall
         McCormick Road    Charlottesville, VA 22903
Office:    B011    +1-434-982-4729
Lab:        B019    +1-434-982-4751
Fax:        +1-434-982-4766
WWW:    http://www.people.virginia.edu/~mk9y/



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