We've recently upgraded to version 8.x and have been working on changing our backup procedure to incorporate the changes to LDAP as described here. Running zmslapcat throws a checksum error when executed. The outcome is the same whether LDAP is running or not.

zimbra@apollo:~$ /opt/zimbra/libexec/zmslapcat -c /opt/zimbra/backup/ldap
52274e03 ldif_read_file: checksum error on "/opt/zimbra/data/ldap/config/cn=config.ldif"
52274e04 ldif_read_file: checksum error on "/opt/zimbra/data/ldap/config/cn=config.ldif"
zimbra@apollo:~$ /opt/zimbra/libexec/zmslapcat /opt/zimbra/backup/ldap
52274e68 ldif_read_file: checksum error on "/opt/zimbra/data/ldap/config/cn=config.ldif"
I found the same error message in zimbra.log when LDAP starts up:

Sep  4 11:08:45 localhost slapd[12126]: @(#) $OpenLDAP: slapd 2.4.35 (May 24 2013 11:37:31) $#012#011root@zre-ubuntu12-64:/home/build/p4/zimbra/IRONMAIDEN/ThirdParty/openldap/openldap-
Sep  4 11:08:45 localhost slapd[12126]: ldif_read_file: checksum error on "/opt/zimbra/data/ldap/config/cn=config.ldif"
Sep  4 11:08:45 localhost slapd[12127]: slapd starting
Fortunately everything seems to be functional, but I am concerned our backups aren't valid.
Is anyone else encountering this? The only mention of this I've been able to find is on a French speaking Zimbra forum and that comment had no replies.
Is it safe to ignore?