You said the KDCs where Microsoft ADs. Is this a PAC size problem?
Did the users get added to extra groups when this started?

Did one of the fixes for copying a large ticket over the pioctl
interface creep back in?

One test/fix would be to change the afs principal to not use a PAC.
i.e. set NO_AUTH_DATA_REQUIRED in the afs principal in AD. Its would be
easy to test/install:

http://support.microsoft.com/kb/832572
http://support.microsoft.com/kb/305144
http://support.microsoft.com/kb/327825


Jeffrey Altman wrote:

Then try to answer the other question.  What changed in your environment
that just before all your Windows systems broke.

Jeffrey Altman


Gjefle, Paul D wrote:

Yes we are experiencing this problem across the board with all windows
systems.

--Paul


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 Douglas E. Engert  <[EMAIL PROTECTED]>
 Argonne National Laboratory
 9700 South Cass Avenue
 Argonne, Illinois  60439
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