rem: aDragDropObserver.onDragOver(flavour); 
add: aDragDropObserver.onDragOver(aEvent, flavour); 
context:   dragOver: function (aEvent, aDragDropObserver)    {       var dragSession = this.mDragService.getCurrentSession();      if (dragSession)        {          var flavourList = aDragDropObserver.getSupportedFlavours();          for (var flavour in flavourList)            {              if (dragSession.isDataFlavorSupported(flavour))                {                  dragSession.canDrop = true;                  if (aDragDropObserver.onDragOver)                    aDragDropObserver.onDragOver(flavour);                  aEvent.preventBubble();                  break;                }            }        }    },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/8c0cf89fe915743abbc88b796a6a1b37356db2dc/nsDragAndDrop.js/buggy/xpfe/global/resources/content/nsDragAndDrop.js