Migration to CS4 has caused problems with production

Hi guys

We have been developing a production in Flash CS3 for the past month. We were experiencing problems with memory leaks in Flash Player 9 and it was recommended that we upgrade to Flash CS4 and Flash Player 10 so we could use the new unloadAndStop() method to unload assets from the production.

On upgrading to FP10 we were able to solve our memory leak issue. But on doing so, the upgrade introduced a new problem into our production. Some of the methods that worked in FP9, now do not work in FP10. Nothing in the code of the methods has changed.

Is anyone aware of any bugs in FP10 or any differences in the coding that is needed to do tasks like reference the stage, create event listeners, etc? And any solutions to these problems?

Cheers
Jay