I just noticed this for http://packages.gentoo.org/package/app-portage/gatt-svn The homepage link is invalid as it is "http://www.gentoo.org/proj/en/base/x86/at.xml%20http://www.gentoo.org/proj/en/base/ppc/AT/index.xml%20http://www.gentoo.org/proj/en/base/amd64/at/index.xml%20http://www.gentoo.org/proj/en/base/alpha/AT/index.xml" while I haven't confirmed this I would assume that the ebuild has many url's within its HOMEPAGE var. (Seems logical)
fixed in Git.