Running spamcleaner.php I recieve the message: require_js: yui_json - file not found.
I get spam in config.php I have already change config.php with a clean one
Running spamcleaner.php in other Moodle didnt report the message
Moodle Version with spam is 1.8.2
You need to update your Moodle to a more recent version than that: http://moodle.org/downloads