How to downgrade Samba from v.33 to v.28 in RHEL 5.2

Issue

• When attempting to migrate from samba-3.0.33 to samba-3.0.28, yum fails with a downgrade dependency on libsmbclient

# yum downgrade samba-3.0.28-0.el5.8 samba-common-3.0.28-0.el5.8 samba-client-3.0.28-0.el5.8  *smb* -y
Loaded plugins: rhnplugin, security
This system is receiving updates from RHN Classic or RHN Satellite.
Setting up Downgrade Process
No Match for available package: gnome-vfs2-smb-2.16.2-4.el5.i386
No Match for available package: libsmbclient-devel-3.0.33-3.28.el5.i386
Only Upgrade available on package: pam_smb-1.1.7-7.2.1.i386
Resolving Dependencies
--> Running transaction check
---> Package libsmbclient.i386 0:3.0.33-3.39.el5_8 set to be updated
---> Package libsmbclient.i386 0:3.0.33-3.40.el5_10 set to be erased
---> Package samba.i386 0:3.0.28-0.el5.8 set to be updated
---> Package samba.i386 0:3.0.33-3.40.el5_10 set to be erased
---> Package samba-client.i386 0:3.0.28-0.el5.8 set to be updated
---> Package samba-client.i386 0:3.0.33-3.40.el5_10 set to be erased
---> Package samba-common.i386 0:3.0.28-0.el5.8 set to be updated
---> Package samba-common.i386 0:3.0.33-3.40.el5_10 set to be erased
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================================================
 Package                             Arch                        Version                                     Repository                                 Size
=============================================================================================================================================================
Downgrading:
 libsmbclient                        i386                        3.0.33-3.39.el5_8                           rhel-i386-server-5                        909 k
 samba                               i386                        3.0.28-0.el5.8                              rhel-i386-server-5                         16 M
 samba-client                        i386                        3.0.28-0.el5.8                              rhel-i386-server-5                        4.8 M
 samba-common                        i386                        3.0.28-0.el5.8                              rhel-i386-server-5                        8.7 M

Transaction Summary
=============================================================================================================================================================
Remove        0 Package(s)
Reinstall     0 Package(s)
Downgrade     4 Package(s)

Total download size: 31 M
Downloading Packages:
(1/4): libsmbclient-3.0.3 100% |=========================| 909 kB    00:00
(2/4): samba-client-3.0.2 100% |=========================| 4.8 MB    00:04
(3/4): samba-common-3.0.2 100% |=========================| 8.7 MB    00:08
(4/4): samba-3.0.28-0.el5 100% |=========================|  16 MB    00:16
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test


Transaction Check Error:
  file /usr/lib/libsmbclient.so.0 conflicts between attempted installs of samba-common-3.0.28-0.el5.8 and libsmbclient-3.0.33-3.39.el5_8

Error Summary