[XeTeX] hyphen - dieresis

[Hans van Maanen]

Good morning!

In Dutch, there's no dieresis after a hyphenation: tweeën becomes twee-en. I seem to remember this worked like a charm in LaTex and babel, but it does not work anymore in XeLaTex (and not in LaTex with babel, either, I think). 

Here is a minimal example:

%!TEX TS-program = xelatex
%!TEX encoding = UTF-8 Unicode
\documentclass[10pt, a4paper]{article}
\usepackage{polyglossia}
\setmainlanguage[babelshorthands]{dutch}
\usepackage{fontspec, xunicode, xltxtra}
\usepackage[text={3.4cm,10cm}]{geometry} 
\begin{document}

kweeën kweeën kweeën

drieën drieën drieën   

tweeën tweeën tweeën

\end{document}

The ën's at the beginning of the line should all be en's. Am I doing something wrong?

Thanks,

Hans