diff.c unexpected non-minimal diff error

Bind Users,

I keep getting these types of messages in my named log. I checked the bind users archives and a thread posted by Greg Robinson indicates the same
error but I could not find the fix or source of the problem.
I am running BIND 9.2.3rc4.
Please explain these errors:

Apr 22 12:52:48.246 info: received notify for zone 'domainname.com'
Apr 22 12:53:10.270 warning: update with no effect
Apr 22 12:53:10.270 error: diff.c:173: unexpected error:
Apr 22 12:53:10.270 error: unexpected non-minimal diff

I checked the diff.c on line 173

/*
* Look for an existing tuple with the same owner name,
* rdata, and TTL. If we are doing an addition and find a
* deletion or vice versa, remove both the old and the
* new tuple since they cancel each other out (assuming
* that we never delete nonexistent data or add existing
* data).
*
* If we find an old update of the same kind as
* the one we are doing, there must be a programming
* error. We report it but try to continue anyway.
*/
for (ot = ISC_LIST_HEAD(diff->tuples); ot != NULL;
ot = next_ot)
{
next_ot = ISC_LIST_NEXT(ot, link);
if (dns_name_equal(&ot->name, &(*tuplep)->name) &&
dns_rdata_compare(&ot->rdata, &(*tuplep)->rdata) == 0 &&
ot->ttl == (*tuplep)->ttl)
{
ISC_LIST_UNLINK(diff->tuples, ot, link);
if ((*tuplep)->op == ot->op) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"unexpected non-minimal diff");
} else {
dns_difftuple_free(tuplep);
}
dns_difftuple_free(&ot);
break;
}
}


Thus, what is wrong here ?

Regards,


Ron Dutton
Deutsche Bank
Network Engineering
14 Wall Street
212.618.2715
ron.dutton@db.com





--

This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden.