Flow, VBox and HBox layouts have very strange behaviors when I add components later

Adding components (or just nodes) to layouts doesn't wok well. vertical vs. horizontal gets switched. New components don't get centered.

May be related to RT-4522 and it's constellation.

Here's some code to play with. Push the button to see the bug. Swap Flow for VBox and HBox to see more buggy behaviors.

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I don't see a JavaFX 1.2 in the version list.
---

package growflow;

import javafx.stage.Stage;
import javafx.scene.Scene;

import javafx.geometry.HPos;
import javafx.geometry.VPos;
import javafx.scene.layout.Flow;
import javafx.scene.layout.LayoutInfo;

import javafx.scene.Node;

import javafx.scene.control.Button;
import javafx.scene.shape.Polygon;
import javafx.scene.paint.Color;
import javafx.scene.control.Label;
import javafx.scene.text.Font;

def otherShape = Polygon {
        points : [ 0,0, 50,0, 50,50 ]
        fill: Color.BLUE
    }

def otherComponent = Label {
        text: "Bigger, not centered"
        font: Font {
            size:18
        }
        layoutInfo: LayoutInfo {
            hpos: HPos.CENTER,
            vpos: VPos.CENTER
        }

        override public function doLayout() {
            java.lang.System.out.println("doLayout {boundsInParent}");
            super.doLayout();

        }

    }

def growFlowButton: Button =
                    Button {
                        text: "Grow"
                        layoutInfo: LayoutInfo {
                            hpos: HPos.CENTER,
                            vpos: VPos.CENTER
                        }
                        action: function(){
                            flowContent = [growFlowButton, otherComponent];
                                            }
                        }


var flowContent : Node[] = [growFlowButton] on replace {
                                for(node in flowContent) {
                                    java.lang.System.out.println("on replace {node} {node.boundsInParent}");
                                }
                            };

def flow:Flow = Flow {
                        vertical: true;
                        nodeHPos: HPos.CENTER;
                        nodeVPos: VPos.CENTER;
                        layoutInfo: LayoutInfo {
                            hpos: HPos.CENTER,
                            vpos: VPos.CENTER
                        }
                        content: bind flowContent;

                        layoutX: bind (scene.width - flow.width) / 2;
                        layoutY: bind (scene.height - flow.height) / 2;
                    }


def scene = Scene {
        width: 200
        height: 200
        content: [ flow ]
    }

Stage {
    title : "GrowFlow"
    scene: scene
    }