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multi master no syncing.

Hi,
I've setup a multimaster cluster composed of two machine (in my example 192.168.0.204 and 192.168.0.197). 
Everything is working ok and both side are replicating ok.

However, I've a problem I'd like to submit to your sagacity.
When I put down a server, and modify the other server (delete or add), when the first server comes back, the modifications are not pushed in the old server. Server 1 says Entry cn=seb,ou=orgunit,o=org,dc=example,dc=com changed by peer, ignored
Adding new entries works ok and synchronisation happens but for the nodes altered while one of the servers was down, the modifications are lost (or more precisely ignored by the other). 

My questions:
    Is this normal behaviour (Maybe I got the configuration wrong) ?
How may I force the missing entries to be replicated to the other ? (Only solution I found is to wipe the entire database on the down server that force a replication from its peer). 

sincerely,
Seb

Here an extract of the slapd.log from server 1:
Sep 22 10:12:32 dhcp204 slapd[2689]: do_syncrep2: rid=002 (-1) Can't contact LDAP server Sep 22 10:12:32 dhcp204 slapd[2689]: do_syncrepl: rid=002 rc -1 retrying (4 retries left) Sep 22 10:12:32 dhcp204 slapd[2689]: do_syncrep2: rid=004 (-1) Can't contact LDAP server Sep 22 10:12:32 dhcp204 slapd[2689]: do_syncrepl: rid=004 rc -1 retrying (4 retries left) 
Sep 22 10:12:32 dhcp204 slapd[2689]: conn=1002 op=2 UNBIND
Sep 22 10:12:32 dhcp204 slapd[2689]: conn=1002 fd=19 closed
Sep 22 10:12:32 dhcp204 slapd[2689]: conn=1003 op=2 UNBIND
Sep 22 10:12:32 dhcp204 slapd[2689]: conn=1003 fd=20 closed
Sep 22 10:12:37 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=config" ldap_sasl_bind_s failed (-1) Sep 22 10:12:37 dhcp204 slapd[2689]: do_syncrepl: rid=002 rc -1 retrying (3 retries left) Sep 22 10:12:37 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=manager,dc=example,dc=com" ldap_sasl_bind_s failed (-1) Sep 22 10:12:37 dhcp204 slapd[2689]: do_syncrepl: rid=004 rc -1 retrying (3 retries left)
Sep 22 10:12:42 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=manager,dc=example,dc=com" ldap_sasl_bind_s failed (-1) Sep 22 10:12:42 dhcp204 slapd[2689]: do_syncrepl: rid=004 rc -1 retrying (2 retries left) Sep 22 10:12:42 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=config" ldap_sasl_bind_s failed (-1) Sep 22 10:12:42 dhcp204 slapd[2689]: do_syncrepl: rid=002 rc -1 retrying (2 retries left) Sep 22 10:12:47 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=manager,dc=example,dc=com" ldap_sasl_bind_s failed (-1) Sep 22 10:12:47 dhcp204 slapd[2689]: do_syncrepl: rid=004 rc -1 retrying (1 retries left) Sep 22 10:12:47 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=config" ldap_sasl_bind_s failed (-1) Sep 22 10:12:47 dhcp204 slapd[2689]: do_syncrepl: rid=002 rc -1 retrying (1 retries left) Sep 22 10:12:52 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=config" ldap_sasl_bind_s failed (-1) 
Sep 22 10:12:52 dhcp204 slapd[2689]: do_syncrepl: rid=002 rc -1 retrying
Sep 22 10:12:52 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=manager,dc=example,dc=com" ldap_sasl_bind_s failed (-1) 
Sep 22 10:12:52 dhcp204 slapd[2689]: do_syncrepl: rid=004 rc -1 retrying
Sep 22 10:12:57 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=config" ldap_sasl_bind_s failed (-1) Sep 22 10:12:57 dhcp204 slapd[2689]: do_syncrepl: rid=002 rc -1 retrying (4 retries left) Sep 22 10:12:57 dhcp204 slapd[2689]: slap_client_connect: URI=ldap://192.168.0.197 DN="cn=manager,dc=example,dc=com" ldap_sasl_bind_s failed (-1) Sep 22 10:12:57 dhcp204 slapd[2689]: do_syncrepl: rid=004 rc -1 retrying (4 retries left) Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1007 fd=13 ACCEPT from IP=192.168.0.197:55471 (IP=0.0.0.0:389) Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1007 op=0 BIND dn="cn=manager,dc=example,dc=com" method=128 Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1007 op=0 BIND dn="cn=manager,dc=example,dc=com" mech=SIMPLE ssf=0 Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1007 op=0 RESULT tag=97 err=0 text= Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1008 fd=15 ACCEPT from IP=192.168.0.197:55473 (IP=0.0.0.0:389) Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1008 op=0 BIND dn="cn=config" method=128 Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1008 op=0 BIND dn="cn=config" mech=SIMPLE ssf=0 Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1008 op=0 RESULT tag=97 err=0 text= Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1008 op=1 SRCH base="cn=config" scope=2 deref=0 filter="(objectClass=*)" 
Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1008 op=1 SRCH attr=* +
Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1008 op=1 INTERM oid=1.3.6.1.4.1.4203.1.9.1.4 Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1007 op=1 SRCH base="dc=example,dc=com" scope=2 deref=0 filter="(objectClass=*)" 
Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1007 op=1 SRCH attr=* +
Sep 22 10:13:02 dhcp204 slapd[2689]: srs csn 20110922081225.199039Z#000000#000#000000 Sep 22 10:13:02 dhcp204 slapd[2689]: log csn 20110922081225.199039Z#000000#000#000000 
Sep 22 10:13:02 dhcp204 slapd[2689]: cmp 0, too old
Sep 22 10:13:02 dhcp204 slapd[2689]: Entry cn=seb,ou=orgunit,o=org,dc=example,dc=com changed by peer, ignored Sep 22 10:13:02 dhcp204 slapd[2689]: syncprov_search_response: cookie=rid=003,csn=20110922081235.611410Z#000000#000#000000 Sep 22 10:13:02 dhcp204 slapd[2689]: conn=1007 op=1 INTERM oid=1.3.6.1.4.1.4203.1.9.1.4 Sep 22 10:17:57 dhcp204 slapd[2689]: do_syncrep2: rid=002 LDAP_RES_INTERMEDIATE - REFRESH_DELETE Sep 22 10:17:57 dhcp204 slapd[2689]: do_syncrep2: rid=004 LDAP_RES_INTERMEDIATE - REFRESH_DELET