ActionScript 3.0 :: Determining Stage Coordinates After Scrolling?

I have a graphical component and I am trying to obtain it's coordinates relative to the stage by using the localToGlobal or contentToGlobal methods.

My problem is when scrolling a Container, these methods do not return the correct values, but return the old unshifted coordinates of the graphical component. Later, after everything seems stable, when trying to use the methods they return correct value so this means at the time where I use them after scrolling not all information necessary in computing have been commited.

For the case of the Container class I have investigated and although it passes through the scrollChildren method, the computation is wrong.For the case of the Tree component when scrolling with the wheel, the methods return correct value, but when pressing the arrow button of the scroll-bar the methods return incorrect value.

Until now I have tried to listen the scroll and the update complete events when they are dispatched but without any success. So my problem is that after scrolling I would need to know a moment(event to be listened or something else) that I can call the methods and the output to be ok.I would like the final solution to be uniform.