MySQLのレプリケーションのエラーについてです。

090611 20:13:03 [ERROR] Error in Log_event::read_log_event(): 'Found invalid event in binary log', data_len: 48, event_type: 19
090611 20:13:03 [ERROR] Error reading relay log event: slave SQL thread aborted because of I/O error090611 20:13:03 [ERROR] Slave: Could not parse relay log event entry. The possible reasons are: the master's binary log is corrupted (you can check this by running 'mysqlbinlog' on the binary log), the slave's relay log is corrupted (you can check this by running 'mysqlbinlog' on the relay log), a network problem, or a bug in the master's or slave's MySQL code. If you want to check the master's binary log or slave's relay log, you will be able to know their names by issuing 'SHOW SLAVE STATUS' on this slave. Error_code: 0

MYSQLのバージョンは5.0.45 OSはCentOS 5.2です。
エラー前はSlave_IO_Running=YES,Slave_SQL_Running=YESになっていました。

どのような点を確認すればよいでしょうか？アドバイスをお願いします。