[XeTeX] Palatino and mapping error?

[Alex Hamann]

I run into a problem with Palatino and correct mapping. In the  
minimal example provided below I am unable to get the correct  
mapping. the hyphen will always end up on the second "t" unless I  
deactivate Mapping - but then I do not get any mapping at all which  
is not what I want.
I also know that the Ligatures are not the cause for the problem  
since swichting them all off (Ligatures= 
{Required,Common,Rare,Logos,Rebus,Diphthong,Squared,AbbrevSquared,Icelan 
dic}) does not solve the problem.

Any help is greatly appreciated,


alex


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\documentclass[a4paper, 12pt, oneside]{article}

\usepackage[english, german]{babel}
\usepackage{xunicode, fontspec}

\setmainfont[Mapping=tex-text]{Palatino}

\begin{document}
im Klett--Cotta Verlag
\end{document}
%%%%%%%%%%%%