Spezi23 - 2010-07-04

I have a problem adding text with special characters (German umlauts in this case). I prepared this minimal example:

input metauml;
\begin{empdef}[diagram](0, 0)
topToBottom(20)(b, A, e);
drawObjects(b, A, e);
clink(transition)(b, A);
clink(transition)(A, e);
\caption{some diagram}

When using

pdflatex -quiet umlaute
mpost -quiet umlaute.mp
pdflatex -quiet umlaute

to compile this, the file umlaute.mp still contains the correctly encoded text but something is going wrong in the last call when the PostScript-converted diagram is inserted into the document. How can this be solved?

Best regards,