dfu-programmer 0.6.2 has been released on 18 Jul 2013. latest version currently in portage is 0.6.1.
+*dfu-programmer-0.6.2 (27 Nov 2013) + + 27 Nov 2013; Tony Vroon <chainsaw@gentoo.org> +dfu-programmer-0.6.2.ebuild: + Version bump, as requested by Wolfram Schlich in bug #492598.