THis issue especially happen in Centos 5. It's because MySQLi API not compatible with MySQL 5.0.x (already exist in Centos 5). No problem with Centos 6 because already exist MySQL 5.5.
But, I think latest version is OK because when install Kloxo-MR install mysql55 branch instead 'default' mysql.
Sadly, immediately Kloxo-MR update again because MySQLi API (procedural method) also deprecated like MySQL API. Now, I work to convert to MySQLi API (object method).