  Recent experimental observation by the CBELSA/TAPS collaboration indicates a
downward mass shift of the $\omega$ meson when put into a nuclear medium.
Therefore it is worthwhile to take a look at theoretical approaches that can
describe this mass shift. One such hadronic model was introduced by Klingl et
al. (Nucl.Phys. A650:299-312). We will demonstrate that the heavy baryon limit
approximation used there has no justification and returns wrong results. The
results obtained with a correct treatment of the relevant $2\pi$-channel lead
to unreasonable results for the $\omega$ selfenergy in medium.
