[ACM Press the the 6th joint meeting of the European software engineering conference and the ACM SIGSOFT symposium - Dubrovnik, Croatia (2007.09.03-2007.09.07)] Proceedings of the the 6th joint meeting of the European software engineering conference and the ACM SIGSOFT symposium on The foundations of software engineering - ESEC-FSE '07 - Training on errors experiment to detect fault-prone software modules by spam filter