I've changed the way pdb_nds handles users with no Universal or Simple Password so that after migration from NT to samba and NDS users can authenticate only needing the samba NT/LM hashes.
Created attachment 1034 [details] Patch: modifies pdb_nds.c - NDS specific.
Applied (with one modest change :-). Thanks ! Jeremy.
sorry for the same, cleaning up the database to prevent unecessary reopens of bugs.