A test case demonstrating problems with setting flickable = null in the Ubuntu SDK. (Now fixed!)

flickable.qml

import QtQuick 2.0
import Ubuntu.Components 0.1
import Ubuntu.Components.ListItems 0.1

MainView {
    width: units.gu(50)
    height: units.gu(75)

    Page {
        id: page
        title: "Page Title"
        flickable: listView

        ListView {
            id: listView
            anchors {
                top: parent.top
                left: parent.left
                right: parent.right
                bottom: button.top
            }
            model: 20
            delegate: Standard { text: "Testing " + modelData }
            clip: true
        }

        Button {
            id: button
            text: page.flickable ? "De-flickate" : "Re-flickate"
            anchors {
                left: parent.left
                right: parent.right
                bottom: parent.bottom
            }
            onClicked: {
                page.flickable = (page.flickable ? null : listView)
                if (page.flickable == null)
                    listView.topMargin = 0
            }
        }
    }
}