The copying of the relay log files from a MySQL slave server into a backup (which has been the default behavior of MySQL Enterprise Backup since 3.11.0) crashed MySQL Enterprise Backup when the server is of version 5.5. (Bug #19904912)

The copying of the binary log files from the server into a backup (which has been the default behavior of MySQL Enterprise Backup since 3.11.0) caused some databases to be silently skipped over during the backup process when (1) the binary log files were located in the server's data directory, and the name of any database matched the data directory’s base name or (2) the binary log files were located in a subdirectory of the data directory. (Bug #19883801)