Expanding the RHEL6 package failed on RHEL5 machine with rpm2cpio and cpio

Issue

• I use rpm2cpio and cpio command to expand a rpm package. This worked for RHEL5 packages on RHEL5, and it worked for RHEL6 packages on RHEL6.

# rpm2cpio wget-1.12-1.8.el6.x86_64.rpm | cpio -id

• When I tried to expand a rpm package for Red Hat Enterprise Linux 6 on Red Hat Enterprise Linux 5, it failed as below.

# rpm2cpio wget-1.12-1.8.el6.x86_64.rpm | cpio -id
cpio: warning: skipped 8826 bytes of junk
...snip...
cpio: premature end of file