MyISAM warnings on temporary tables
Temporary tables do not specify the engine to be used and so are created with the default engine (often MyISAM). This in turn causes the MyISAM check to complain. See https://civicrm.stackexchange.com/questions/27683/wordpress-myisam-database-engine-error-after-update
This could be fixed either by specifying the engine when creating temporary tables, or excluding them from the MyISAM check.
See also #183 (comment 10333)