[CentOS] Help with yum and cpio: MD5 sum mismatch

I am trying to install Ruby-1.8.7p302 on a CentOS-5.5 server in
preparation for a Rails-3 application deployment.  I have downloaded
the source from Rubyforge.org, unpacked it, and ran ./config and
make.  Everything built without error. I then ran checkinstall to
create an rpm package. That too completed without error.

However, when I try to install the resulting package using:

yum localinstall /path/to/package --nogpgcheck I get this message:
.  .  .
Running Transaction
  Installing     : ruby-1.8.7                                       
       1/1
Error unpacking rpm package ruby-1.8.7-p302-1.i386
error: unpacking of archive failed on file /usr/bin/make;4cf56119:
cpio: MD5 sum mismatch

Failed:
  ruby-1.8.7.i386 0:p302-1

Does anyone here know how to work around this?

-- 
***          E-Mail is NOT a SECURE channel          ***
James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited          http://www.harte-lyne.ca
9 Brockley Drive              vox: +1 905 561 1241
Hamilton, Ontario             fax: +1 905 561 0757
Canada  L8E 3C3