Description of problem:
Running ipa-client-install in RHEL5.1 + RHEL5.9 ipa-client packages fails with the following message:
...
2013-07-08 11:07:56,290 DEBUG args=kinit admin.GSNET.CORP
2013-07-08 11:07:56,290 DEBUG stdout=Password for admin.GSNET.CORP: 
2013-07-08 11:07:56,290 DEBUG stderr=winscard_clnt.c:320:SCardEstablishContextTH() Cannot open public shared file: /v
ar/run/pcscd.pub
2013-07-08 11:07:56,291 DEBUG trying to retrieve CA cert via LDAP from ldap://vmlbcipal01.idm.lvtc.gsnet.corp
2013-07-08 11:07:56,433 DEBUG get_ca_cert_from_ldap() error: Local error SASL(-1): generic failure: GSSAPI Error: Uns
pecified GSS failure.  Minor code may provide more information (Unknown code krb5 7)
2013-07-08 11:07:56,433 DEBUG {'info': 'SASL(-1): generic failure: GSSAPI Error: Unspecified GSS failure.  Minor code
 may provide more information (Unknown code krb5 7)', 'desc': 'Local error'}
2013-07-08 11:07:56,434 ERROR Cannot obtain CA certificate
'ldap://vmlbcipal01.idm.lvtc.gsnet.corp' doesn't have a certificate.
2013-07-08 11:07:56,446 DEBUG args=kdestroy
2013-07-08 11:07:56,447 DEBUG stdout=
2013-07-08 11:07:56,447 DEBUG stderr=
...

Version-Release number of selected component (if applicable):
ipa-client-2.1.3-5.el5_9.2.x86_64.rpm

How reproducible:
Try to enroll a RHEL5.1 client with RHEL5.9 ipa-client packages

Steps to Reproduce:
1. Install RHEL5.1
2. Install ipa-client packages from RHEL5.9
3. Run ipa-client-install

Actual results:
...
2013-07-08 11:07:56,290 DEBUG args=kinit admin.GSNET.CORP
2013-07-08 11:07:56,290 DEBUG stdout=Password for admin.GSNET.CORP: 
2013-07-08 11:07:56,290 DEBUG stderr=winscard_clnt.c:320:SCardEstablishContextTH() Cannot open public shared file: /v
ar/run/pcscd.pub
2013-07-08 11:07:56,291 DEBUG trying to retrieve CA cert via LDAP from ldap://vmlbcipal01.idm.lvtc.gsnet.corp
2013-07-08 11:07:56,433 DEBUG get_ca_cert_from_ldap() error: Local error SASL(-1): generic failure: GSSAPI Error: Uns
pecified GSS failure.  Minor code may provide more information (Unknown code krb5 7)
2013-07-08 11:07:56,433 DEBUG {'info': 'SASL(-1): generic failure: GSSAPI Error: Unspecified GSS failure.  Minor code
 may provide more information (Unknown code krb5 7)', 'desc': 'Local error'}
2013-07-08 11:07:56,434 ERROR Cannot obtain CA certificate
'ldap://vmlbcipal01.idm.lvtc.gsnet.corp' doesn't have a certificate.
2013-07-08 11:07:56,446 DEBUG args=kdestroy
2013-07-08 11:07:56,447 DEBUG stdout=
2013-07-08 11:07:56,447 DEBUG stderr=
...

Expected results:
ipa-client-install execution succesfully

Additional info:
Removing pcsc-lite and re-running ipa-client-install works fine