Just had a not starting Kerberos after updating to SP3 so the whole XAD
thing did not come up at all.

After 3 long sessions with NTS and a week without DSfW and hours of
work a wrong library path in the ndsd startup script, (which was
introduced by CASA, which is installed along with the ZCM server agent)
was indentified as culprit.

So if anyone with this combination wants to upgrade hold back till a
fix for this is available or ask NTS for a patched ndsd startup script.

I could give you more information on this issue, too, but depending on
other installed applications there may be need for different solutions
to prevent other things from failure.
W. Prindl