As libreoffice no longer supports fonts in Type1 format,
Gentoo's URW fonts cannot be used in libreoffice any longer,
because Gentoo only provides Type1 URW fonts.
TTF (and even OTF) ports of the URW fonts exist
and are provided as a separate package in many linux distributions.
Please replace the fonts in urw-fonts by their TTF versions
or provide a separate URW TTF package,
it is needed for libreoffice documents containing URW fonts!
URW OTF font ebuild:
*** This bug has been marked as a duplicate of bug 589890 ***