dynlist +memberOf loses casing in memberOf attribute

Good evening,

We are currently in the process of upgrading our OpenLDAP installation and we have hit a behaviour we can’t explain by perusing the documentation.

When using slapo-dynlist to set memberOf attributes the dn of the group the object is a member of gets lowercased. So for example the object that is a member of a group has:

=== memberOf: ou=kiosk,ou=ags,ou=groups,dc=fsinfo,dc=cs,dc=tu-dortmund,dc=de ===

Although the group has a dn of:

=== dn: ou=Kiosk,ou=AGs,ou=groups,dc=fsinfo,dc=cs,dc=tu-dortmund,dc=de ===

Is this expected behaviour? Is there a setting we overlooked? Is this is a bug in the version shipped with Ubuntu (2.5.6+dfsg-1~exp1ubuntu1.1)?

Thank you,

Felix