060807 11:40:17 [ERROR] While trying to obtain the list of 
slaves from the master 'xxx.xxx.xxx:3306', user 'rep' got the
 following error: 'Access denied. You need the REPLICATION SLAVE
 privilege for this operation'

mysql>SHOW GRANT FOR 'rep'@'192.168.0.2'\G
*************************** 1. row ***************************
Grants for rep@192.168.0.2: GRANT SELECT, REPLICATION SLAVE ON
 *.* TO 'rep'@'192.168.0.2' IDENTIFIED BY PASSWORD 'xxx'

SHOW SLAVE HOSTS;