The latest version of doxygen is 1.8.1.2 (release date July 12th 2012).
+*doxygen-1.8.1.2 (28 Jul 2012) + + 28 Jul 2012; Kacper Kowalik <xarthisius@gentoo.org> +doxygen-1.8.1.2.ebuild: + Version bump wrt #428332 by Michał Górny <mgorny@gentoo.org>