Empty Comment= lines make app-install show po header

There are some .desktop files, that contain for some reason empty Comment= lines:

grep -r "^Comment=$" /usr/share/app-install/desktop/*
/usr/share/app-install/desktop/cultivation.desktop:Comment=
/usr/share/app-install/desktop/ffado.org-ffadomixer.desktop:Comment=
/usr/share/app-install/desktop/galan.desktop:Comment=
/usr/share/app-install/desktop/gcvs.desktop:Comment=
/usr/share/app-install/desktop/glashctl.desktop:Comment=
/usr/share/app-install/desktop/guidedog.desktop:Comment=
/usr/share/app-install/desktop/kchmviewer.desktop:Comment=
/usr/share/app-install/desktop/kde4_juk.desktop:Comment=
/usr/share/app-install/desktop/kde4_kmouth.desktop:Comment=
/usr/share/app-install/desktop/kde_kallery.desktop:Comment=
/usr/share/app-install/desktop/kde_knowit.desktop:Comment=
/usr/share/app-install/desktop/kde_kradio.desktop:Comment=
/usr/share/app-install/desktop/nethack-qt.desktop:Comment=
/usr/share/app-install/desktop/nethack-x11.desktop:Comment=
/usr/share/app-install/desktop/puredata.desktop:Comment=
/usr/share/app-install/desktop/pushover.desktop:Comment=
/usr/share/app-install/desktop/rezound.desktop:Comment=
/usr/share/app-install/desktop/sear.desktop:Comment=
/usr/share/app-install/desktop/sooperlooper.desktop:Comment=
/usr/share/app-install/desktop/spider.desktop:Comment=
/usr/share/app-install/desktop/Stepulator.desktop:Comment=
/usr/share/app-install/desktop/vodovod.desktop:Comment=
/usr/share/app-install/desktop/wmitime.desktop:Comment=
/usr/share/app-install/desktop/xmille.desktop:Comment=

This was on Jaunty. The result is that app-install and software-store show the po header, which looks ugly:

http://kepfeltoltes.hu/090918/wtf_huh_www.kepfeltoltes.hu_.png

A simple resoulton would be to throw out these lines at packaging time.