http://jre.us.oracle.com/java/re/javafx/8.0/prepromote/ea/b106
When we trying to select colors in Modena, NPE exceptions will be thrown:
Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
        at com.sun.javafx.scene.control.skin.ProgressIndicatorSkin$Indeterminate
Spinner.rebuildTimeline(ProgressIndicatorSkin.java:586)
        at com.sun.javafx.scene.control.skin.ProgressIndicatorSkin$Indeterminate
Spinner.setSpinEnabled(ProgressIndicatorSkin.java:478)
        at com.sun.javafx.scene.control.skin.ProgressIndicatorSkin$6.invalidated
(ProgressIndicatorSkin.java:780)
        at javafx.beans.property.BooleanPropertyBase.markInvalid(BooleanProperty
Base.java:109)
        at javafx.beans.property.BooleanPropertyBase.set(BooleanPropertyBase.jav
a:143)
        at javafx.css.StyleableBooleanProperty.set(StyleableBooleanProperty.java
:83)
        at javafx.css.StyleableBooleanProperty.applyStyle(StyleableBooleanProper
ty.java:69)
        at javafx.css.StyleableBooleanProperty.applyStyle(StyleableBooleanProper
ty.java:45)
        at javafx.scene.CssStyleHelper.resetToInitialValues(CssStyleHelper.java:
385)
        at javafx.scene.CssStyleHelper.createStyleHelper(CssStyleHelper.java:190
)
        at javafx.scene.Node.impl_processCSS(Node.java:8675)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1216)
        at javafx.scene.control.Control.impl_processCSS(Control.java:866)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1228)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1228)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1228)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1228)
        at javafx.scene.control.Control.impl_processCSS(Control.java:866)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1228)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1228)
        at javafx.scene.control.Control.impl_processCSS(Control.java:866)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1228)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1228)
        at javafx.scene.Parent.impl_processCSS(Parent.java:1228)
        at javafx.scene.Node.processCSS(Node.java:8604)
        at javafx.scene.Node.impl_processCSS(Node.java:8649)
        at com.sun.javafx.scene.control.skin.ComboBoxBaseSkin.updateDisplayArea(
ComboBoxBaseSkin.java:140)
        at com.sun.javafx.scene.control.skin.ComboBoxBaseSkin.handleControlPrope
rtyChanged(ComboBoxBaseSkin.java:122)
        at com.sun.javafx.scene.control.skin.ColorPickerSkin.handleControlProper
tyChanged(ColorPickerSkin.java:458)
        at com.sun.javafx.scene.control.skin.BehaviorSkinBase$2.call(BehaviorSki
nBase.java:189)
        at com.sun.javafx.scene.control.skin.BehaviorSkinBase$2.call(BehaviorSki
nBase.java:187)
        at com.sun.javafx.scene.control.MultiplePropertyChangeListenerHandler$1.
changed(MultiplePropertyChangeListenerHandler.java:55)
        at javafx.beans.value.WeakChangeListener.changed(WeakChangeListener.java
:88)
        at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent
(ExpressionHelper.java:347)
        at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(Express
ionHelper.java:80)
        at javafx.beans.property.ObjectPropertyBase.fireValueChangedEvent(Object
PropertyBase.java:105)
        at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBa
se.java:112)
        at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:
145)
        at javafx.scene.control.ComboBoxBase.setValue(ComboBoxBase.java:167)
        at com.sun.javafx.scene.control.skin.ColorPalette$ColorSquare$2.handle(C
olorPalette.java:454)
        at com.sun.javafx.scene.control.skin.ColorPalette$ColorSquare$2.handle(C
olorPalette.java:449)
        at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.h
andleBubblingEvent(CompositeEventHandler.java:218)
        at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Comp
ositeEventHandler.java:80)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventH
andlerManager.java:238)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventH
andlerManager.java:191)
        at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(C
ompositeEventDispatcher.java:59)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:58)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.java:114)
        at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
        at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
        at javafx.event.Event.fireEvent(Event.java:203)
        at javafx.scene.Scene$MouseHandler.process(Scene.java:3585)
        at javafx.scene.Scene$MouseHandler.process(Scene.java:3379)
        at javafx.scene.Scene$MouseHandler.access$1900(Scene.java:3330)
        at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1613)
        at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2390)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotificatio
n.run(GlassViewEventHandler.java:322)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotificatio
n.run(GlassViewEventHandler.java:247)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Glas
sViewEventHandler.java:364)
        at com.sun.glass.ui.View.handleMouseEvent(View.java:517)
        at com.sun.glass.ui.View.notifyMouse(View.java:882)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.access$300(WinApplication.java:39
)
        at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:101)
        at java.lang.Thread.run(Thread.java:724)