The latest release of pacemaker-1.0 branch is 1.0.11, published April 29, 2011. The latest 1.0 release in portage is currently 1.0.10, please bump.
Thanks for reporting Luca, it's in tree now ! +*pacemaker-1.0.11 (05 Jul 2011) + + 05 Jul 2011; Ultrabug <ultrabug@gentoo.org> +pacemaker-1.0.11.ebuild: + Version bump wrt #373481.