Charlie
I thought long and hard about whether to post here or in bugzilla, but i am looking for someone who has experience of using MACs in a configuration with SMEServer, so i surmised that I am far more likely to find someone here, than in the bugzilla. As it works fine for the "tiger" variant, it is unlikely (but not impossibly) to be an SMEServer bug, more likely a change in the way leopard works. Possibly a (already known?) leopard bug.
So, I shall stick to my guns and wait and see...