The renaming of man-pages such as groff.1.man works, but has bugs. The newly named man-pages is installed as groff.1.1, which is accepted by man, groffer, make install, make uninstall.
This error is therefore not a real bug, but is quite ugly and may hit some external man programs. Unfortunately I do not have time during the next week or longer. So I would be very glad, if someone could help and fix this bug, maybe in top-source/Makefile.am. Bernd Warken