Bullet points do not appear (in \itemize environment with Hebrew font David CLM)

Question

I am writing Hebrew using the David CLM font (from Culmus). Using this font there are no bullet points in \itemize environments. I do not understand why. It works as it is supposed to work with other fonts. I thought all that stuff was independent from the actual font!

Here is a MWE:

% !TEX encoding = UTF-8 Unicode
% !TEX TS-program = xelatex
\documentclass[14pt]{scrbook}
\usepackage{fontspec}
\usepackage{xltxtra}
\usepackage{polyglossia}

\setdefaultlanguage{hebrew}
\setmainfont{David CLM}

\begin{document}
\begin{itemize}
\item למה
\item אין פה
\item נקודות?
\end{itemize}
\end{document}

Answer 1

Looks like your font does not have a symbol for \textbullet. A quick hack is to take it from another font, for example, using enumitem to globally redefine the label of itemize,

\usepackage{enumitem}
\setlist[itemize,1]{label={\fontfamily{cmr}\fontencoding{T1}\selectfont\textbullet}}

This uses \textbullet from Computer Modern Roman on the first level of itemize (since itemize,1 above). You might want to experiment with other symbols on this and other levels of the list.