Has anyone using Moodle 1.8 notice the problem with the Member Attribute and the Member Attribute uses dn fields. If you put something in the Member Attribute field and then save it it disappears. If you put something in the Member Attribute uses dn field it shows up in the Member Attribute field after saving. If you save it again with the Member Attribute uses dn field empty the entry in Member Attribute disappears.
Probably needs to be reported as a bug if it hasn't already.