Since the addition of _uninstall_uneeded, we remove a couple of packages (notably update-rc.d and run-postinsts) from the image as one of the final steps when constructing the image. However, because of the order of operations, these packages are still listed both in the buildhistory installed_package*.txt files and in the manifest file created next to the image, which is wrong.
Fix merged to master: http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=26e5b0f7b9a52d6eed7d46c003c45b202acabebc