Last version of blender in portage is release candidate. Download site has stable version. Reproducible: Always 2.72a was announced but I've not seen any links to tarball.
Created attachment 386954 [details, diff] fixed patch
*blender-2.72 (27 Sep 2014) 27 Sep 2014; Julian Ospald <hasufell@gentoo.org> +blender-2.72.ebuild, +files/05-blender-2.72-unbundle-eigen3.patch: version bump
+*blender-2.72b (27 Oct 2014) + + 27 Oct 2014; Julian Ospald <hasufell@gentoo.org> +blender-2.72b.ebuild, + +files/09-blender-2.72b-unbundle-minilzo.patch: + version bump wrt #525870