test021-certificate fails on hp-ux 11i & openldap 2.2.21

["Chapman, Kyle" <Kyle_Chapman@G1.com>]

wondering if anyone else has seen a failure on test 021.
looking at the test slapd's log, i can see some of the operation working fine, however the mod request fails returning an error that the value already exists.  i sure could have done something bad...
 
this is with hpux 11i v1, hp ansi c, openldap 2.2.21, openssl 0.9.7e, sasl 2.1.20, heimdal 0.6.3, db 4.3.27
all the other tests (bdb backend) work untill the cert test.  i can provide the test.out and slapd.1.log if needed
 
it appears the other mods worked fine until doing the add/delete...
here is a small part of the error from the slapd log:
conn=1 op=4 MOD dn="cn=Jennifer Smith,ou=Alumni Association,ou=People,o=University of Michigan,c=US"
conn=1 op=4 MOD attr=userCertificate;binary userCertificate;binary
bdb_dn2entry("cn=jennifer smith,ou=alumni association,ou=people,o=university of michigan,c=us")
=> ldap_dn2bv(16)
ldap_err2string
<= ldap_dn2bv(email=ca@example.com,cn=example ca,o=openldap example\2C ltd.,st=california,c=us)=0 Success
dnX509Normalize: <email=ca@example.com,cn=example ca,o=openldap example\2C ltd.,st=california,c=us>
certificateExactNormalize: 0$email=ca@example.com,cn=example ca,o=openldap example\2C ltd.,st=california,c=us
=> ldap_dn2bv(16)
ldap_err2string
<= ldap_dn2bv(email=ca@example.com,cn=example ca,o=openldap example\2C ltd.,st=california,c=us)=0 Success
dnX509Normalize: <email=ca@example.com,cn=example ca,o=openldap example\2C ltd.,st=california,c=us>
certificateExactNormalize: 0$email=ca@example.com,cn=example ca,o=openldap example\2C ltd.,st=california,c=us
bdb_modify: cn=Jennifer Smith,ou=Alumni Association,ou=People,o=University of Michigan,c=US
bdb_dn2entry("cn=jennifer smith,ou=alumni association,ou=people,o=university of michigan,c=us")
bdb_modify_internal: 0x0000000f: cn=Jennifer Smith,ou=Alumni Association,ou=People,o=University of Michigan,c=US
bdb_modify_internal: add
bdb_modify_internal: 20 modify/add: userCertificate;binary: value #0 already exists
bdb_modify: modify failed (20)
send_ldap_result: conn=1 op=4 p=3
send_ldap_result: err=20 matched="" text="modify/add: userCertificate;binary: value #0 already exists"
send_ldap_response: msgid=5 tag=103 err=20
ber_flush: 73 bytes to sd 9
conn=1 op=4 RESULT tag=103 err=20 text=modify/add: userCertificate;binary: value #0 already exists 
  
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