MinionPro: \textcompwordmark broken

[jspitz]

Since some time, \textcompwordmark does not work any longer with MinionPro (v. 2012/08/03 v2.3 pulled today from this repo).

MWE:

\documentclass[ngerman]{article}
\usepackage[lf]{MinionPro}
\usepackage[T1]{fontenc}

\usepackage{babel}

\begin{document}

Auf\textcompwordmark fassung

\end{document}

This yields:

! TeX capacity exceeded, sorry [grouping levels=255].
\UseTextSymbol  #1#2->\hmode@start@before@group {
                                                 \def \@wrong@font@char {\Me...
l.9 Auf\textcompwordmark
                         fassung
If you really absolutely need more capacity,
you can ask a wizard to enlarge me.

Looks like, whatever \UndeclareTextCommand{\textcompwordmark}{T1} in MinionPro.sty is supposed to do, it does not work any more.