When we dragged an image file into Scene builder running on Mac, it worked on:
    System Version: Mac OS X 10.6.8 (10K549)

but got an exception on:
   Software Mac OS X Lion 10.7.4 (11E53)

Glass detected outstanding Java exception at -[GlassViewDelegate sendJavaDndEvent:type:]:src/com/sun/mat/ui/GlassViewDelegate.m:873
Exception in thread "JavaFX Application Thread" java.lang.IllegalArgumentException: PrismEventUtils.convertToTransferMode: bad drop action: 4fffffff
   at com.sun.javafx.tk.quantum.PrismEventUtils.convertToTransferMode(PrismEventUtils.java:193)
   at com.sun.javafx.tk.quantum.PrismEventUtils.glassDragEventToFX(PrismEventUtils.java:147)
   at com.sun.javafx.tk.quantum.PrismEventUtils.glassDropTargetEventToFX(PrismEventUtils.java:172)
   at com.sun.javafx.tk.quantum.QuantumToolkit.convertDropTargetEventToFX(QuantumToolkit.java:1145)
   at javafx.scene.Scene$DropTargetListener.dragEnter(Scene.java:2503)
   at com.sun.javafx.tk.quantum.GlassSceneDnDEventHandler.handleDragEnter(GlassSceneDnDEventHandler.java:60)
   at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleDragEnter(GlassViewEventHandler.java:376)
   at com.sun.glass.ui.View.handleDragEnter(View.java:691)
   at com.sun.glass.ui.View.notifyDragEnter(View.java:1004)