Index: lams_central/web/lams_authoring.swf
===================================================================
diff -u -r4ae57947df368bd25c092641c8f657428315bf5e -r0d2b62ff5f1e06568936567798a8e53c1c15eeec
Binary files differ
Index: lams_central/web/lams_authoring_library.swf
===================================================================
diff -u -r4ae57947df368bd25c092641c8f657428315bf5e -r0d2b62ff5f1e06568936567798a8e53c1c15eeec
Binary files differ
Index: lams_flash/src/central/flash/org/lamsfoundation/lams/authoring/cv/Bin.as
===================================================================
diff -u -reaa9b5ca1c61bf87f01ef2edbb3362a1b1a85115 -r0d2b62ff5f1e06568936567798a8e53c1c15eeec
--- lams_flash/src/central/flash/org/lamsfoundation/lams/authoring/cv/Bin.as	(.../Bin.as)	(revision eaa9b5ca1c61bf87f01ef2edbb3362a1b1a85115)
+++ lams_flash/src/central/flash/org/lamsfoundation/lams/authoring/cv/Bin.as	(.../Bin.as)	(revision 0d2b62ff5f1e06568936567798a8e53c1c15eeec)
@@ -44,6 +44,8 @@
 	private var up_mc:MovieClip;
 	private var over_mc:MovieClip;
 	
+	private var _blocked:Boolean;
+	
 	//Defined so compiler can 'see' events added at runtime by EventDispatcher
     private var dispatchEvent:Function;     
     public var addEventListener:Function;
@@ -67,6 +69,8 @@
 	private function draw(){
 		over_mc._visible = false;
 		up_mc._visible = true;
+		
+		setStyles();
 	}
 	
 	private function onRelease():Void{
@@ -87,4 +91,40 @@
 	private function onRollOut():Void{
 		_tip.CloseToolTip();
 	}
+	
+	private function setStyles():Void {
+		//var styleObj = _tm.getStyleObject("bin");
+		over_mc._alpha = 40;
+	}
+	
+	private function setOn(a:Boolean):Void {
+		over_mc._visible = a;
+		up_mc._visible = !a;
+	}
+	
+	public function setOff():Void {
+		setOn(false);
+	}
+	
+	public function isActivityOverBin(ca:MovieClip, isInit:Boolean):Void {
+		var hit = ca.hitTest(this);
+		_blocked = (isInit || (!hit && _blocked)) ? hit : _blocked;
+		
+		if(!isInit && !_blocked)
+			setOn(hit);
+	}
+	
+	public function initBlocked(ca:MovieClip):Boolean {
+		isActivityOverBin(ca, true);
+		
+		return _blocked;
+	}
+	
+	public function set blocked(a:Boolean):Void {
+		_blocked = blocked;
+	}
+	
+	public function get blocked():Boolean {
+		return _blocked;
+	}
 }
\ No newline at end of file
Index: lams_flash/src/central/flash/org/lamsfoundation/lams/authoring/cv/CanvasController.as
===================================================================
diff -u -r34cb1725fa1d312652042fd3108aceaa65adf7ad -r0d2b62ff5f1e06568936567798a8e53c1c15eeec
--- lams_flash/src/central/flash/org/lamsfoundation/lams/authoring/cv/CanvasController.as	(.../CanvasController.as)	(revision 34cb1725fa1d312652042fd3108aceaa65adf7ad)
+++ lams_flash/src/central/flash/org/lamsfoundation/lams/authoring/cv/CanvasController.as	(.../CanvasController.as)	(revision 0d2b62ff5f1e06568936567798a8e53c1c15eeec)
@@ -45,7 +45,11 @@
 	private var app:Application;
 	private var _isBusy:Boolean;
 	private var _tempSelectedItem:Object;
+	private var _binCheckIntervalID:Number;
+	private var _binBlock:Boolean;
 	
+	private static var BIN_CHECK_INTERVAL:Number = 100;
+	
 	/**
 	* Constructor
 	*
@@ -65,7 +69,7 @@
 	}
    
     public function activityClick(ca:Object):Void{
-	
+		
 		_tempSelectedItem = _canvasModel.selectedItem;
 		_canvasModel.selectedItem = null;
 		
@@ -103,6 +107,10 @@
 					ca.depthHistory = ca.getDepth();
 					ca.swapDepths(DepthManager.kTopmost);
 				}
+				
+				_binBlock = _canvasModel.getCanvas().bin.initBlocked(ca);
+				_binCheckIntervalID = setInterval(Proxy.create(_canvasModel.getCanvas().bin, _canvasModel.getCanvas().bin.isActivityOverBin, ca, false), BIN_CHECK_INTERVAL);
+				
 				ca.startDrag(false);
 				_canvasModel.isDragging = true;
 			}
@@ -169,6 +177,7 @@
 		
 	    if(_canvasModel.isDragging) {
 			ca.stopDrag();
+			
 			if (ca.activity.isOptionalActivity() || ca.activity.isOptionsWithSequencesActivity()) {
 				ca.swapDepths(ca.depthHistory);
 				ca.depthHistory = null;
@@ -322,7 +331,9 @@
 			
 			// if we are on the bin - trash it
 			isActivityOnBin(ca);
+			clearInterval(_binCheckIntervalID);
 			
+			
 			//get a view if ther is not one
 			if(!_canvasView)
 				_canvasView =  CanvasView(getView());
@@ -619,7 +630,7 @@
 		var r:Object = null;
 		var parentUIID:Number = ca.activity.parentUIID;
 		
-		if(ca.hitTest(_canvasModel.getCanvas().bin)) {
+		if(ca.hitTest(_canvasModel.getCanvas().bin) && !_canvasModel.getCanvas().bin.blocked) {
 			if(_canvasModel.activeView instanceof CanvasComplexView) {
 				var seqActivity:Activity = Activity(_canvasModel.ddm.getActivityByUIID(parentUIID));
 				if(seqActivity.isOptionalSequenceActivity(_canvasModel.ddm.getActivityByUIID(seqActivity.parentUIID)))
@@ -667,6 +678,8 @@
 					activitySnapBack(ca);
 				}
 			}
+			
+			_canvasModel.getCanvas().bin.setOff();
 		}
 	}