Problem in upgrading to Fedora 11

[Jayakrishnan M]

Hi all,

Sorry for a long mail.
I am trying to upgrade a Fedora 10 installation to Fedora 11 using yum.
I am following the instructions given here:
http://fedoraproject.org/wiki/YumUpgradeFaq

But when I try to install the fedora-release rpm, it gives the error

[root at jk ~]# rpm -Uvh fedora-release-11-1.noarch.rpm
warning: fedora-release-11-1.noarch.rpm: Header V3 RSA/SHA256
signature: NOKEY, key ID d22e77f2
Preparing...                ########################################### [100%]
   1:fedora-release         ########################################### [100%]
error: unpacking of archive failed on file
/etc/fedora-release;4a7a982b: cpio: MD5 sum mismatch

I tried googling and the results were pointing to changes needed int
machine where rpm is created.
So I tried to install fedora-release-11-1.src.rpm. But that also failed.

[root at jk ~]# rpm -ivh fedora-release-11-1.src.rpm
warning: fedora-release-11-1.src.rpm: Header V3 RSA/SHA256 signature:
NOKEY, key ID d22e77f2
   1:fedora-release         warning: user mockbuild does not exist - using root
warning: group mockbuild does not exist - using root
########################################### [100%]
error: unpacking of archive failed on file
/root/rpmbuild/SOURCES/fedora-release-11.tar.gz;4a7a95c2: cpio: MD5
sum mismatch

Any thoughts?
I checked the signature, and it shows md5 not ok.

[root at kabini ~]# rpm -K fedora-release-11-1.noarch.rpm
fedora-release-11-1.noarch.rpm: RSA sha1 ((MD5) PGP) md5 NOT OK
(MISSING KEYS:(MD5) PGP#d22e77f2)

I had downloaded the rpm from fedora website.
Please let me know if you have encountered the same problem and any
solutions for this.

Thanks,
Jayakrishnan