This has been hanging around since pre-1.0, and I forgot what the
fix was.  I'm getting it frequently, every six or seven minutes.
What does this error mean?  What can I do with ser.c to get rid
of it?  My connection is at 38400, which should easily be handled
by my A3000/040.

Thanks,
David Hopper (bard@tiamat.chaldea.com)