Setting Stage's stagestyle attribute to Transparent throws up an exception.
This is a blocker introduced in marina and works in franca release.

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Error setting window transparency using AWTUtilities
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.javafx.tk.swing.WindowImpl.setWindowTransparency(WindowImpl.j
ava:199)
        at com.sun.javafx.tk.swing.WindowStage.initializeStyle(WindowStage.java:
142)
        at com.sun.javafx.tk.swing.FrameStage.initializeStyle(FrameStage.java:74
)
        at com.sun.javafx.tk.swing.WindowStage.<init>(WindowStage.java:80)
        at com.sun.javafx.tk.swing.FrameStage.<init>(FrameStage.java:51)
        at com.sun.javafx.tk.swing.SwingToolkit.createTKStage$impl(SwingToolkit.
fx:118)
        at com.sun.javafx.tk.swing.SwingToolkit.createTKStage(SwingToolkit.fx:71
)
        at javafx.stage.Stage.applyDefaults$javafx$stage$Stage$impl_peer(Stage.f
x:109)
        at javafx.stage.Stage.initialize$(Stage.fx:108)
        at transparentStage.javafx$run$(transparentStage.fx:6)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.javafx.runtime.provider.GUIRuntimeProvider$1.run(GUIRuntimePr
ovider.java:66)
        at com.sun.javafx.tk.swing.SwingToolkit$StartupRoutine.run$impl(SwingToo
lkit.fx:754)
        at com.sun.javafx.tk.swing.SwingToolkit$StartupRoutine.run(SwingToolkit.
fx:707)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.IllegalArgumentException: The effects for decorated windows
 are not supported.
        at com.sun.awt.AWTUtilities.setWindowOpaque(AWTUtilities.java:388)
        ... 29 more

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