ttfonts-1.0-1.noarch.rpm included the following postinstall script:

cd /usr/share/fonts/default/TrueType
/usr/bin/ttmkfdir &>/dev/null || :

This is, obviously, not doing anything useful.  From my understanding
something of that sort is required there instead or installed fonts
will be not really accesible.

cd /usr/share/fonts/default/TrueType
if [ -x /usr/bin/ttmkfdir ] ; then
   /usr/bin/ttmkfdir >fonts.dir
   ln -s fonts.dir fonts.scale
fi
exit 0

  Michal
  michal