JavaFX experiment

I was having a lot of problems getting the simplest test case below to run without throwing an odd exception:

import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.*;
import javafx.ext.swing.SwingTextField;
import javafx.ext.swing.SwingButton;

Stage {
    title : "MyApp"
    scene: Scene {
        width: 200
        height: 200
        content: [
            VBox{
                content:
                [
                SwingTextField {
                columns: 10
                text: "TextField"
                editable: true
                },
                SwingButton {
                text: "Button"
                action: function() {  }
                }]
            }

        ]
    }
}

SwingTextField barfs like this:

Exception in thread "AWT-EventQueue-1" java.lang.IllegalArgumentException: Zero length string passed to TextLayout constructor.
        at java.awt.font.TextLayout.(TextLayout.java:364)
        at sun.font.FontDesignMetrics.charsWidth(FontDesignMetrics.java:487)
        at javax.swing.text.Utilities.getTabbedTextWidth(Utilities.java:262)
        at javax.swing.text.Utilities.getTabbedTextWidth(Utilities.java:191)
        at javax.swing.text.PlainView.modelToView(PlainView.java:335)
        at javax.swing.text.FieldView.modelToView(FieldView.java:248)
        at javax.swing.plaf.basic.BasicTextUI$RootView.modelToView(BasicTextUI.java:1496)
        at javax.swing.plaf.basic.BasicTextUI.modelToView(BasicTextUI.java:1034)
        at javax.swing.text.DefaultCaret.paint(DefaultCaret.java:600)
        at javax.swing.plaf.basic.BasicTextUI.paintSafely(BasicTextUI.java:730)
        at javax.swing.plaf.basic.BasicTextUI.paint(BasicTextUI.java:868)
        at javax.swing.plaf.basic.BasicTextUI.update(BasicTextUI.java:847)
        at javax.swing.JComponent.paintComponent(JComponent.java:758)
        at javafx.ext.swing.JTextFieldImpl.paintComponent(JTextFieldImpl.java:77)
        at javax.swing.JComponent.paint(JComponent.java:1022)
        at javax.swing.JComponent.paintChildren(JComponent.java:859)
        at javax.swing.JComponent.paint(JComponent.java:1031)
        at com.sun.embeddedswing.EmbeddedPeer.paint(EmbeddedPeer.java:135)
        at com.sun.scenario.scenegraph.SGComponent.paint(SGComponent.java:121)
        at com.sun.scenario.scenegraph.SGLeaf.render(SGLeaf.java:179)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:122)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:222)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:122)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:222)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:222)
        at com.sun.scenario.scenegraph.JSGPanel.paintComponent(JSGPanel.java:582)
        at javax.swing.JComponent.paint(JComponent.java:1022)
        at javax.swing.JComponent.paintChildren(JComponent.java:859)
        at javax.swing.JComponent.paint(JComponent.java:1031)
        at javax.swing.JLayeredPane.paint(JLayeredPane.java:564)
        at javax.swing.JComponent.paintChildren(JComponent.java:859)
        at javax.swing.JComponent.paintToOffscreen(JComponent.java:5111)
        at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1386)
        at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1317)
        at javax.swing.RepaintManager.paint(RepaintManager.java:1132)
        at javax.swing.JComponent.paint(JComponent.java:1008)
        at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:21)
        at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60)
        at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97)
        at java.awt.Container.paint(Container.java:1797)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:738)
        at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:667)
        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:128)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at com.sun.embeddedswing.EmbeddedEventQueue.dispatchEvent(EmbeddedEventQueue.java:369)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

Running javafx with the verbose switch pointed the fault out

javafx -verbose:class test
:
:
[Loaded java.awt.Container$EventTargetFilter from c:\Progra~1\Java\jdk1.6.0\jre\lib\rt.jar]
:

I was running an old version of the JDK!
Unsetting the JAVA_HOME resolved the problem.
I hope this helps somebody.

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