Am 05.03.2012 17:03, schrieb Fabian Greffrath:
This happens because the upstream install rule is not overridden in debian/rules anymore, so it installs the files into $(datadir)/fonts/cantarell (see otf/Makefile.am) and then the same files are again installed by means of debian/install - this time into the correct location in /usr/share/fonts/opentype/cantarell.
Added myself to Uploaders and fixed that, hope you don't mind. ;) - Fabian