Index: lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/MonitoringAction.java
===================================================================
diff -u -r1b117caf4135f53248542cbc97d71aac448f3de9 -rf51eef8d23931e557f48c8896a22aa4cf23d6716
--- lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/MonitoringAction.java	(.../MonitoringAction.java)	(revision 1b117caf4135f53248542cbc97d71aac448f3de9)
+++ lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/MonitoringAction.java	(.../MonitoringAction.java)	(revision f51eef8d23931e557f48c8896a22aa4cf23d6716)
@@ -743,7 +743,8 @@
 		}
 	    }
 	}
-
+	
+	response.setContentType("application/json;charset=utf-8");
 	response.getWriter().write(responseJSON.toString());
 	return null;
     }
@@ -1273,7 +1274,8 @@
 	    responseJSON.put("startDate",
 		    indfm.format(tzStartDate) + " " + user.getTimeZone().getDisplayName(userLocale));
 	}
-
+	
+	response.setContentType("application/json;charset=utf-8");
 	response.getWriter().write(responseJSON.toString());
 	return null;
     }
@@ -1349,6 +1351,7 @@
 
 	responseJSON.put("activities", new JSONArray(activitiesMap.values()));
 	responseJSON.put("numberPossibleLearners", lessonDetails.getNumberPossibleLearners());
+	response.setContentType("application/json;charset=utf-8");
 	response.getWriter().write(responseJSON.toString());
 
 	return null;
Index: lams_monitoring/web/includes/javascript/monitorLesson.js
===================================================================
diff -u -r1b117caf4135f53248542cbc97d71aac448f3de9 -rf51eef8d23931e557f48c8896a22aa4cf23d6716
--- lams_monitoring/web/includes/javascript/monitorLesson.js	(.../monitorLesson.js)	(revision 1b117caf4135f53248542cbc97d71aac448f3de9)
+++ lams_monitoring/web/includes/javascript/monitorLesson.js	(.../monitorLesson.js)	(revision f51eef8d23931e557f48c8896a22aa4cf23d6716)
@@ -1255,33 +1255,36 @@
 function showLearnerGroupDialog(activityId, dialogTitle, learners, allowForceComplete, allowView) {
 	var learnerGroupList = $('#learnerGroupList').empty();
 	var learnerGroupDialog = $('#learnerGroupDialog');
-	$.each(learners, function(learnerIndex, learner) {
-		var learnerDiv = $('<div />').attr({
-								'userId'  : learner.id,
-								'viewUrl'    : learner.url
-								})
-		                      .addClass('dialogListItem')
-						      .text(getLearnerDisplayName(learner))
-						      .appendTo(learnerGroupList);
-		
-		if (allowForceComplete || allowView) {
-			learnerDiv.click(function(){
-		    	  // select a learner
-		    	  $(this).addClass('dialogListItemSelected')
-		    	  	.siblings('div.dialogListItem')
-		    	  	.removeClass('dialogListItemSelected');
-			    	// enable buttons
-			    	$('button.learnerGroupDialogSelectableButton')
-			    		.attr('disabled', null);
-		    });
-			if (allowView){
-				learnerDiv.dblclick(function(){
-					// same as clicking View Learner button
-					openPopUp(LAMS_URL + learner.url, "LearnActivity", 600, 800, true);
-				});
+	
+	if (learners) {
+		$.each(learners, function(learnerIndex, learner) {
+			var learnerDiv = $('<div />').attr({
+									'userId'  : learner.id,
+									'viewUrl'    : learner.url
+									})
+			                      .addClass('dialogListItem')
+							      .text(getLearnerDisplayName(learner))
+							      .appendTo(learnerGroupList);
+			
+			if (allowForceComplete || allowView) {
+				learnerDiv.click(function(){
+			    	  // select a learner
+			    	  $(this).addClass('dialogListItemSelected')
+			    	  	.siblings('div.dialogListItem')
+			    	  	.removeClass('dialogListItemSelected');
+				    	// enable buttons
+				    	$('button.learnerGroupDialogSelectableButton')
+				    		.attr('disabled', null);
+			    });
+				if (allowView){
+					learnerDiv.dblclick(function(){
+						// same as clicking View Learner button
+						openPopUp(LAMS_URL + learner.url, "LearnActivity", 600, 800, true);
+					});
+				}
 			}
-		}
-	});
+		});
+	}
 	
 	// show buttons depending on parameters
 	$('button#learnerGroupDialogForceCompleteButton')