I noticed this:
/usr/share/fonts/cMap/Identity-UTF16-H
/usr/share/fonts/cmap/Identity-H
/usr/share/fonts/cmap/Identity-V
/usr/share/fonts/cmap/adobe-cns1
/usr/share/fonts/cmap/adobe-gb1
/usr/share/fonts/cmap/adobe-japan1
/usr/share/fonts/cmap/adobe-japan2
/usr/share/fonts/cmap/adobe-korea1
This stroke me as odd, possibly buggy or an oversight
(or a developer works on a case-insensitive OS or so).
It also ships CMap according to dpkg -L.
This probably ought to be reviewed, and if it is indeed
correct, /usr/share/doc/poppler-data/README.Debian could
note it.