If I take a package such as http://kojipkgs.fedoraproject.org/packages/kernel/2.6.29/0.147.rc6.fc11/noarch/kernel-doc-2.6.29-0.147.rc6.fc11.noarch.rpm which was built with rpm-4.6.0-8.fc11 and try to install it on Fedora 10 (rpm-4.6.0-0.rc3.1.fc10.x86_64), I get the error error: unpacking of archive failed on file /usr/share/doc/kernel-doc-2.6.29/Documentation/00-INDEX;49a4014e: cpio: MD5 sum mismatch I have tried a few such packages and two different machines with the same cpio: MD5 sum mismatch error. A package built with rpm-4.6.0-7.fc11 will install correctly in the same situation.
Updating to rpm-4.6.0-1.fc10 fixes this. It's been available in updates-testing for some time and just a moment ago pushed to final updates. Until mirrors get synced you might have better luck with pulling from updates-testing.
Oh and just FYI, the difference doesn't come from rpm-4.6.0-7.fc11 vs rpm-4.6.0-8.fc11 but build configuration change between redhat-rpm-config 9.0.3-6.fc11 and 9.0.3-7.fc11.
So the problem is that Fedora 11 is now using SHA-256 checksums. I did pull the update from F10 updates-testing and the rpm does now install. Are there any plans to introduce SHA-256 checksum support to Fedora 9 rpm, so that will support these rpms as well?
Closing as this is now resolved in generally available updates. And no, F9 wont get SHA-256 support, backporting is too painful (and risky too).