New version of scripts or software do not mean better than the old one. Sometimes the old one is better because it is fully tested or debugged. It is also proven to be reliable by thousand of users. Take for example Zend Optimizer and PHP. Recently the latest Zend optimizer 3.3.0 causing havoc. At non busy times like sunday morning, the white screen of death will occur and Apache webserver needs to be started manually. This is such a pain. I downgraded to Zend 3.28 and by looking at Apache logs, segmentation faults are logged rarely than the latest version.