When using umlauts in article names, they are not in the correct
alphabetical order when looking at the categories.
Usually umlauts as ä, ö, ü should be handled as ae, oe, ue (in
the german Wikipedia) or as a, o, u (in the swedish Wikipedia)
when sorting them.
But now an article name "München" appears at the end oft the
list after "Mzzzzzz...".
This seems to be a software bug.