LDAP fails to map picture uri

In the LDAP config file, when a field populated by a uri is mapped as ldap_user_picture_uri, the om_user table in the database is populated with the field name (e.g. 'labeleduri') instead of the uri contained within the field.

Attached files show an export from the LDAP of a sample user, the mapping section from the OM LDAP configuration file, and the relevant entry in the om_user database.