Index: lams_central/web/includes/javascript/authoring/authoringActivity.js
===================================================================
diff -u -r028082a4ecee7e516e0befda2dd1183e2fc42002 -r7e450026a56b1f065c08bcee3eadcde6d0844d7d
--- lams_central/web/includes/javascript/authoring/authoringActivity.js	(.../authoringActivity.js)	(revision 028082a4ecee7e516e0befda2dd1183e2fc42002)
+++ lams_central/web/includes/javascript/authoring/authoringActivity.js	(.../authoringActivity.js)	(revision 7e450026a56b1f065c08bcee3eadcde6d0844d7d)
@@ -725,8 +725,7 @@
 			// set all the handlers
 			activity.items.attr('cursor', 'pointer')
 						  .mousedown(HandlerActivityLib.activityMousedownHandler)
-						  .click(HandlerLib.itemClickHandler)
-	  		      		  .dblclick(HandlerActivityLib.activityDblclickHandler);
+	  		      		  .click(HandlerActivityLib.activityClickHandler);
 			
 			if (activity instanceof ActivityDefs.BranchingEdgeActivity
 					&& activity.branchingActivity.end) {
Index: lams_central/web/includes/javascript/authoring/authoringHandler.js
===================================================================
diff -u -r78d3840bba4ebbc2d65e9d8d064f3fc209b189ab -r7e450026a56b1f065c08bcee3eadcde6d0844d7d
--- lams_central/web/includes/javascript/authoring/authoringHandler.js	(.../authoringHandler.js)	(revision 78d3840bba4ebbc2d65e9d8d064f3fc209b189ab)
+++ lams_central/web/includes/javascript/authoring/authoringHandler.js	(.../authoringHandler.js)	(revision 7e450026a56b1f065c08bcee3eadcde6d0844d7d)
@@ -249,17 +249,35 @@
  * Contains handlers for actions over Activities.
  */
 HandlerActivityLib = {
+	// double tap support
+	tapTimeout : 500,
+	lastTapTime : 0,
+	lastTapTarget : null,
 		
 	/**
 	 * Double click opens activity authoring.
 	 */
-	activityDblclickHandler : function(event) {
-		var activity = ActivityLib.getParentObject(this);
-		if (activity.readOnly) {
-			alert(LABELS.LIVEEDIT_READONLY_ACTIVITY_ERROR);
-		} else {
-			ActivityLib.openActivityAuthoring(activity);
+	activityClickHandler : function(event) {
+		var activity = ActivityLib.getParentObject(this),
+			currentTime = new Date().getTime();
+		// is the second click on the same activity as the first one?
+		if (activity == HandlerActivityLib.lastTapTarget) {
+			// was the second click quick enough after the first one?
+			var tapLength = currentTime - HandlerActivityLib.lastTapTime;
+			if (tapLength < HandlerActivityLib.tapTimeout && tapLength > 0) {
+				event.preventDefault();
+				if (activity.readOnly) {
+					alert(LABELS.LIVEEDIT_READONLY_ACTIVITY_ERROR);
+				} else {
+					ActivityLib.openActivityAuthoring(activity);
+				}
+				return;
+			}
 		}
+		HandlerActivityLib.lastTapTime = currentTime;
+		HandlerActivityLib.lastTapTarget = activity;
+		// single click
+		HandlerLib.itemClickHandler.call(this, event);
 	},