Bug in Flow layout?

Question

Before I made a JIRA entry, wanted to see if anyone else thought this was a bug. It drove me crazy for days.
It appears that if I initialize a Flow content at the time of creation of the Flow object, all is well. However, if I add content in bulk afterwards, all elements are stacked on top of each other. Other layouts (like HBox seem to work just fine). More interestingly, 'later' if I add or remove elements from the flow, it adjusts its size and positions of everything correctly. Weird.
This works fine:
function createFlow():Flow{
    var flow:Flow = Flow{
         width: 100 hgap: 5 vgap: 10
         content: for (i in [1..5])
         Rectangle { width: 40 height: 40 }
Stage {
    scene: Scene {
        content: [
             createFlow()
}However, this way stacks the rectangles on top of each other for some reason.
function createFlow():Flow{
    var flow:Flow = Flow{
         width: 100 hgap: 5 vgap: 10
     for (i in [1..5])
         insert Rectangle { width: 40 height: 40 } into flow.content;
    return flow;
Stage {
    scene: Scene {
        content: [
             createFlow()
}

Answer 1

Indeed, it sounds as a bug H/VBox had in 1.1.
I can reproduce your problem with JavaFX 1.2 on Windows XP Pro SP3.
The following code works fine too:
Stage {
    scene: Scene {
        content: [
//~             createFlow()
               Flow {
                    width: 100 hgap: 5 vgap: 10
                    content: for (i in [1..5])
                         Rectangle { width: 40 height: 40 }
}but this one fails:
function createFlow(): Flow {
    var flow: Flow = Flow {
        width: 100 hgap: 5 vgap: 10
    var content = for (i in [1..5])
          Rectangle { width: 40 height: 40 };
    flow.content = content;
    return flow;
}Looks like Flow prefers to have its sequence provided at creation time...