This note is just to confirm the diagnosis and cure of the previous
messages.  I just put out a change set that fixes the error.  With it,
I can take in all the changes.

For those not following the details: there was nothing wrong with the
update changeset; the error was in some code I introduced.  The fix I
just put out fixes that bug.

On Player56, which Doug mentioned, I've noticed that some classes seem
to get created dynamically during fileins.  I'm not sure of the exact
mechanism, but there is not Player56 class in my image when I look
(even while in the debugger, as I recall).

Thanks to Scott for catching this, and to everyone for their help.