Prior to 1.2.7, how was this configuration working for you? What sort of
values were you setting in the "uniqueMember" attribute? The memberOf
plug-in really needs a full DN to work, which is why the restriction to use
an attribute with the DN syntax was added.
We use the uniqueMember attribute in a rather typical manner for group
objects: to list the DNs of the sub-groups and members :
cn: My Group
uniqueMember: cn=Another Group,ou=Groups,dc=example,dc=com
It's a relatively common way of uniqueMember usage, not limited to our
environment, i think.