Quick Fix PHP Warning: Parameter 1 to wpdb::escape_by_ref() expected to be a ref

db-module-wrapper.php

	function __call( $name, $args ) {
        if (strcmp($name, "escape_by_ref") == 0) {

            if ((is_array($args)) && (count($args)==1)) {
                return call_user_func_array( array( $this->dbcr_wpdb, $name ),  array(&$args[0]));
            }

            return call_user_func_array( array( $this->dbcr_wpdb, $name ), $args );
        }
		return call_user_func_array( array( $this->dbcr_wpdb, $name ), $args );
	}
}

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http://wordpress.org/extend/plugins/db-cache-reloaded-fix/