xelatex broken: How do I get Arabic vowels back in mactex 2011?

Question

I upgraded to mactex 2011 from 2009 and xelatex (XeTeX, Version 3.1415926-2.3-0.9997.5 (TeX Live 2011)) no longer produces the same output when using Arabic language. The vowels (called harakaat in arabic) are missing in the pdf output. They used to show up fine and mactex 2009, and no longer do in 2011. I'd appreciate any assistance.. Here is a minimal example..

\documentclass{article}
\usepackage{fontspec}
\usepackage{arabxetex}
\usepackage{fullpage}

\newfontinstance\farsifont[Script=Arabic,Scale=1.6,WordSpace=2]{mylotus}
\newfontinstance\arabicfont[Script=Arabic,Scale=1.6,WordSpace=2,Mapping=arabicdigits]{mylotus}
\setromanfont[Mapping=tex-text]{Verdana}

\begin{document}
\begin{enumerate}
\item{There are many languages in the world.\\
\textarab{في العالمِ لغةٌ كثيرةٌ.}\\
}
\end{enumerate}
\end{document}

EDIT:

This is the actual output of the example:

This output shows the missing vowels:

Also, the log of xelatex compile is http://pastebin.com/raw.php?i=9Hraw83d

Answer 1

It seems that you have to tell arabxetex that you are directly inputting Unicode Arabic characters. Using

\textarab[utf]{في العالمِ لغةٌ كثيرةٌ.}

gives the desired output (see also Typesetting a document using Arabic script).

---

Alternatively, since you don't use the Latin input encoding feature of arabxetex, you could use polyglossia:

\documentclass{article}
\usepackage{fontspec}
\usepackage{polyglossia}

\setmainlanguage{english}
\setotherlanguage{arabic}

\newfontfamily\arabicfont[Script=Arabic,Scale=1.6,WordSpace=2,Mapping=arabicdigits]{Scheherazade}
\setromanfont[Mapping=tex-text]{Linux Libertine O}

\begin{document}
\begin{enumerate}
\item
    There are many languages in the world.\\
    \textarabic{في العالمِ لغةٌ كثيرةٌ.}
\end{enumerate}
\end{document}