MD5 Differences in same version of /bin/bash

[Hearn, Stan J.]

What am I missing here?

I'm finding that /bin/bash is identical in every way (size, date stamp, version) on two identical systems except for the MD5 checksum.  How is this possible?

=== SYSTEM A ===
$ md5sum /bin/bash
9df8e0f4872774dfe2005f063af32748  /bin/bash
=== SYSTEM B ===
$ md5sum /bin/bash
0060bf6cde9eb7f726ce18b5c150620b  /bin/bash

=== SYSTEM A ===
$ md5sum /bin/bash
9df8e0f4872774dfe2005f063af32748  /bin/bash
$ rpm -qf /bin/bash
bash-3.2-24.el5
$ /bin/bash --version
GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu)
Copyright (C) 2005 Free Software Foundation, Inc.
$ ls -l /bin/bash
-rwxr-xr-x 1 root root 801512 Oct 21  2008 /bin/bash
$ md5sum --version
md5sum (GNU coreutils) 5.97
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software.  You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.

Written by Ulrich Drepper, Scott Miller, and David Madore.
$ lsb_release -a
LSB Version:    :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: RedHatEnterpriseServer
Description:    Red Hat Enterprise Linux Server release 5.5 (Tikanga)
Release:        5.5
Codename:       Tikanga
$

=== SYSTEM B ===
$ md5sum /bin/bash
0060bf6cde9eb7f726ce18b5c150620b  /bin/bash
$ rpm -qf /bin/bash
bash-3.2-24.el5
$ /bin/bash --version
GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu)
Copyright (C) 2005 Free Software Foundation, Inc.
$ ls -l /bin/bash
-rwxr-xr-x 1 root root 801512 Oct 21  2008 /bin/bash
$ md5sum --version
md5sum (GNU coreutils) 5.97
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software.  You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.

Written by Ulrich Drepper, Scott Miller, and David Madore.
$ lsb_release -a
LSB Version:    :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: RedHatEnterpriseServer
Description:    Red Hat Enterprise Linux Server release 5.5 (Tikanga)
Release:        5.5
Codename:       Tikanga
$