This ended up being a matter of RxMaxMTU being incorrectly
set under:

     HKLM\SYSTEM\ControlSet004\Services\TransarcAFSDaemon\Parameters

instead of the proper place:

     HKLM\SYSTEM\CurrentControlSet\Services\TransarcAFSDaemon\Parameters

Lesson learned:

When someone tells you (previous thread from months ago) to
set RxMaxMTU, don't open regedit.exe and search for RxMaxMTU
to set it.  That might work for awhile, but...

Thanks to Jeffrey Altman of Secure Endpoints for his help,
then final prodding to re-read the OpenAFS for Windows
release notes 'Debugging' section which led me to double
check this setting in the registry.

     http://www.secureendpoints.com/
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