[Warning] /usr/sbin/mysqld: Forcing close of thread 24974085  user: 'XXXX'

SHOW OPEN TABLES;
[etc...]
114 rows in set (0.01 sec)

Make a full slave backup
Redirect FQDN for the master to a dead IP so all services are down and master receives no new queries
When master is receiving no new queries, flush and close all tables individually
Stop mysql on master
Ensure OPTIMIZE TABLE does not cause problems for slave if it is replicated out
Stop mysql on slave
Copy all blog tables from slave to master
Restart master
Restart slave
Check for any corrupt tables and allow them to be repaired
Map FQDN back to the master internal IP
Sanity check of posts on main blog
Restart replication on slave and masters
Make sure replication progresses correctly (multi-master)
Make a full master backup