Due to major problems with the fedora mirror group, please adjust your your package to use the fedora-dev mirror group or a direct link. This also may be rectified by removing 7.2.50.20101117.4.15 (and removing the other ebuilds' special RPM handling code), I don't see a particular reason to keep an unkeyworded fedora version of gdb around, but if there's a reason, that's fine too.
should be all set now in the tree; thanks for the report! Commit message: Convert to mirror://fedora-dev/ http://sources.gentoo.org/sys-devel/gdb/gdb-7.5.1.ebuild?r1=1.18&r2=1.19 http://sources.gentoo.org/sys-devel/gdb/gdb-7.5.ebuild?r1=1.14&r2=1.15 http://sources.gentoo.org/sys-devel/gdb/gdb-7.6.1.ebuild?r1=1.9&r2=1.10 http://sources.gentoo.org/sys-devel/gdb/gdb-7.6.2.ebuild?r1=1.14&r2=1.15 http://sources.gentoo.org/sys-devel/gdb/gdb-7.6.ebuild?r1=1.9&r2=1.10 http://sources.gentoo.org/sys-devel/gdb/gdb-7.7-r1.ebuild?r1=1.6&r2=1.7 http://sources.gentoo.org/sys-devel/gdb/gdb-7.7.1.ebuild?r1=1.14&r2=1.15 http://sources.gentoo.org/sys-devel/gdb/gdb-7.8.1.ebuild?r1=1.6&r2=1.7 http://sources.gentoo.org/sys-devel/gdb/gdb-7.8.2.ebuild?r1=1.5&r2=1.6 http://sources.gentoo.org/sys-devel/gdb/gdb-7.8.ebuild?r1=1.5&r2=1.6 http://sources.gentoo.org/sys-devel/gdb/gdb-7.9.ebuild?r1=1.4&r2=1.5 http://sources.gentoo.org/sys-devel/gdb/gdb-9999.ebuild?r1=1.36&r2=1.37