!!! The following update has been skipped due to unsatisfied dependencies: media-gfx/blender:2.5 emerge: there are no ebuilds to satisfy "=dev-lang/python-3.3*". (dependency required by "media-gfx/blender-2.57-r1" [ebuild])
The message you are getting is a bit deceptive. Blender 2.5 needs >=dev-lang/python-3.2. Try adding this to /etc/portage/package.keywords: dev-lang/python:3.2
*** This bug has been marked as a duplicate of bug 327177 ***