Description of problem:
Replication monitor searches for RUV tombstone entries to get values such as maxCSN. These searches fail to return any entries and replication monitor generates empty report.

When line 368 of repl-monitor.pl 

    $ruv = $conn->search($replicaroot, "one",
         "(&(nsuniqueid=ffffffff-ffffffff-ffffffff-ffffffff)(objectClass=nsTombstone))",
	 0, qw(nsds50ruv nsruvReplicaLastModified));

is changed to 
 
    $ruv = $conn->search($replicaroot, "sub",
         "(&(nsuniqueid=ffffffff-ffffffff-ffffffff-ffffffff)(objectClass=nsTombstone))",
	 0, qw(nsds50ruv nsruvReplicaLastModified));

replication monitor generates full report. Indeed search 

[root@hp-dl380pgen8-02-vm-1 BE_0]# ldapsearch ... -b "o=my_suffix.com" "(&(nsuniqueid=ffffffff-ffffffff-ffffffff-ffffffff)(objectClass=nsTombstone))" -s one

returns no entries, while 

[root@hp-dl380pgen8-02-vm-1 BE_0]# ldapsearch ... -b "o=my_suffix.com" "(&(nsuniqueid=ffffffff-ffffffff-ffffffff-ffffffff)(objectClass=nsTombstone))" -s sub

returns tombstone entries with RUV information.

Version-Release number of selected component (if applicable):
389-ds-base-1.2.11.15-24.el6.x86_64

Additional info:
Possibly related to https://bugzilla.redhat.com/show_bug.cgi?id=788731 .