[CentOS] smartmontools SRPM fails

I want to install smarmontools v 5.40, and so I pulled the
SRPM for 5.39 so I could patch and install...

$ wget -Nc 
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/smartmontools-5.39.1-2.el6.src.rpm

However, the install of the source fails.

$ rpm -ivh smartmontools-5.39.1-2.el6.src.rpm
warning: smartmontools-5.39.1-2.el6.src.rpm: V3 RSA/MD5 signature: 
NOKEY, key ID fd431d51
    1:smartmontools          warning: user mockbuild does not exist - 
using root
warning: group mockbuild does not exist - using root
########################################### [100%]
error: unpacking of archive failed on file 
/home/jmccarty/devtools/RebuildRPM/build/SOURCES/smartd.initd;4d39deaa: 
cpio: MD5 sum mismatch

Is the SRPM corrupted? I've pulled a few from other places for
other versions (like Fedora) from pbone, and they all have
this problem.

Any hints available?

Mike
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