Q:

Are there DFS Diagnostic Utilities server and client

Are there any tools for DFS troubleshooting? Some searches suggest network monitoring, but if you dont know how to read the scans with DFS in mind it seems a bit pointless.

A:

After quite a lot of investigation it turned out the problem was "Pismo File Mount Audit Package" version 51.
Removing this fixed the problem!
Using Safe Mode+Networking identified this - although this kind of fix is getting harder and harder to do. Note to dev, use the error logging facilities!

