Resizing application causes createContentPane to dispatch second Event.REMOVED_FROM_STAGE

Question

My application relies heavily on the addedToStage and removedFromStage events. Yesterday, I hit a rather obscure edge case with these events, described here by an Adobe engineer:
http://blogs.adobe.com/pmartin/2010/03/use_of_stage_ev.html
I used the workaround described in the article where I create a contentPane in createChildren(). However, I find that despite this, when I resize my application window, the same Container throws a removedFromStage event from Container::createContentPane(). The code for that method checks for the existence of a contentPane, so I'm not sure why this is happening. I know that my contentPane is being created because I see the contentPane property change after the createContentPane() call.I'm attaching the code for that call below.
     *  @private
    mx_internal function createContentPane():void
        if (contentPane)
            return;
        creatingContentPane = true;
        // Reparent the children.  Get the number before we create contentPane
        // because that changes logic of how many children we have
        var n:int = numChildren;
        var newPane:Sprite = new FlexSprite();
        newPane.name = "contentPane";
        // Place content pane above border and background image but below
        // all other chrome.
        var childIndex:int;
        if (border)
            childIndex = rawChildren.getChildIndex(DisplayObject(border)) + 1;
            if (border is IRectangularBorder && IRectangularBorder(border).hasBackgroundImage)
                childIndex++;
        else
            childIndex = 0;
        rawChildren.addChildAt(newPane, childIndex);
        for (var i:int = 0; i < n; i++)
            // use super because contentPane now exists and messes up getChildAt();
            var child:IUIComponent =
                IUIComponent(super.getChildAt(_firstChildIndex));
            newPane.addChild(DisplayObject(child));
            child.parentChanged(newPane);
            _numChildren--; // required
        contentPane = newPane;
        creatingContentPane = false
        // UIComponent sets $visible to false. If we don't make it true here,
        // nothing shows up. Making this true should be harmless, as the
        // container itself should be false, and so should all its children.
        contentPane.visible = true;

Answer 1

Nevermind. I was adding the contentPane to the child that was being removed -- it needed to be added to its parent.