furball is a perl script, it is stabilized long time ago on x86, ppc and sparc. Please, keyword it on amd64 too, thanks.
+ 15 Oct 2012; Agostino Sarubbo <ago@gentoo.org> furball-0.5.ebuild: + Add ~amd64 + EAPI4 bump wrt #438448
30 days in tree without bug reports, let's stabilize it on amd64
amd64 stable. Last arch, closing