Full import returns only root node

When running a FULL IMPORT on an IdB5.3.2 implentation I am getting data returned from only 2 of the 7 configured partitions - yet data is clearly visible for each of them via LDP, making me suspect an issue with the Broker for MIM component.  I have tried deleting and recreating run profiles, refreshing schema, reloading interfaces, and even creating a new instance of the MA - but still the same result.

There are no exceptions being logged for the full import (currently in VERBOSE mode).  As an example

• The AREA adapter correctly returns 11 records, including the root container node (although the Total Entities count incorrectly shows as 0 on the Import job counter)
• The COMPANIES adapter returns 1 record, being the container node only - despite all objects appearing correctly via LDAP.EXE.

Can I please have some urgent assistance to determine the root cause?