Here is a follow up. I did a hex/ascii dump of the 3 bad tuples. In the
dump I could pick out an email address. This is an indexed field. I did a
select on each of them in the live database. The 1st and 3rd were not
found. The second worked ok if I only selected the customer id (an int4 and
the first field in the record). The custid reported seems to be nonsense.
The backend crashed if I selected the whole record.
