I recently dipped my toes into the Actionscript 3 toes. This is quite a readjustment from the experience of the past 7/8 years of traditional actionscript development. I was somewhat prepared after having done a lot of projects with Object Oriented programming languages. Specifically Java and C# (VB sucks balls). I, along with most actionscript developers, tried to con ourselves that first abusing the prototype property and then the abortive actionscript 2 was actually OOP.

Found a great little variable in flash on Friday, _lockroot. It makes every reference to _root in a movie refer to its own Stage, no matter what movie loads it in. Theres more here.