This issue occurs with soma graphics scrum #1154, but works fine with 1.2.3.
I've a Text (with both strikethrough and underline set) and a Rectangle drawn binding the Text's bounds (happens with boundsInLocal, boundsInParent or layoutBounds). When the Text's 'strikethrough' value is changed, the following exception is thrown on console

Unexpected exception caught in MasterTimer.timePulse():
java.lang.NullPointerException
at com.sun.scenario.scenegraph.SGText.padBounds(SGText.java:899)
at com.sun.scenario.scenegraph.SGText.computeBounds(SGText.java:860)
at com.sun.javafx.tk.swing.SwingTextHelper.computeBounds(SwingTextHelper.fx:24)
at javafx.scene.text.Text.impl_computeGeomBounds(Text.fx:573)
at javafx.scene.Node.updateGeomBounds(Node.fx:1853)
at javafx.scene.Node.getGeomBounds(Node.fx:1823)
at javafx.scene.Node.getLocalBounds(Node.fx:1807)
at javafx.scene.Node.contains(Node.fx:1320)
at javafx.scene.Node.impl_pick(Node.fx:2233)
at javafx.scene.Node.pick(Node.fx:2223)
at javafx.scene.Scene$MouseHandler.pick(Scene.fx:1495)
at javafx.scene.Scene$MouseHandler.process(Scene.fx:1341)
at javafx.scene.Scene$MouseHandler.pulse(Scene.fx:1288)
at javafx.scene.Scene$ScenePulseListener.pulse(Scene.fx:806)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.fx:143)
at com.sun.javafx.tk.Toolkit.handleMasterTimerPulse(Toolkit.fx:132)
at com.sun.javafx.tk.Toolkit$1com$ObjLit$3.firePulseImpl(Toolkit.fx:304)
at com.sun.scenario.ToolkitAccessor.firePulse(ToolkitAccessor.java:55)
at com.sun.scenario.scenegraph.JSGPanelRepainter$FrameDisplay.run(JSGPanelRepainter.java:133)
at com.sun.scenario.animation.AbstractMasterTimer.timePulseImpl(AbstractMasterTimer.java:412)
at com.sun.scenario.animation.AbstractMasterTimer$MainLoop.run(AbstractMasterTimer.java:288)
at com.sun.embeddedswing.EmbeddedEventQueue.doPulse(EmbeddedEventQueue.java:569)

To reproduce, run the below test. It should show a Text and a transparent blue Rectangle over it. Text has both underline and strikethrough set. Click on the text to change strikethrough. Exception is thrown.

import javafx.scene.*;
import javafx.stage.*;
import javafx.scene.text.*;
import javafx.scene.shape.*;
import javafx.scene.paint.*;

var t1: Text;
var strikethrough: Boolean = true;
var underline: Boolean = true;
Stage {
    scene: Scene {
        content: [t1 = Text {
            x: 40
            y: 50
            content: "ABCD"
            strikethrough: bind strikethrough
            underline: true
            onMouseClicked: function(e) {
                strikethrough = false;
            }
        }, Rectangle {
            x: bind t1.boundsInLocal.minX
            y: bind t1.boundsInLocal.minY
            width: bind t1.boundsInLocal.width
            height: bind t1.boundsInLocal.height
            opacity: 0.4
            fill: Color.BLUE
        }]
    }
}