In the previous post, Debugging in AS3 – Part 2 – Objects, I would have preferred to show you how to debug Objects with the ObjectDumper. The ObjectDumper can be imported using import mx.data.binding.Objectdumper. I tried this in ActionScript 3 and it would not work. I soon realized that all of the mx classes that shipped with Flash 9 Public Alpha are still written in ActionScript 2 and it appears that when you are publishing in ActionScript 3 the path to the mx classes is disabled. This means that we will have to wait to use a lot of the great functionality (Tween, ObjectDumper, etc.) that I took for granted in ActionScript 2. I did read somewhere that you can take the mx classes from the Flex SDK. Seeing as how I am still coding my work related projects in AS2 and only learning AS3 to get a head start, I will just wait until, hopefully, the next release.