diff --git a/calendar/base/content/calendar-month-view.xml b/calendar/base/content/calendar-month-view.xml
index d35125c4240..8cbc066b2dc 100644
--- a/calendar/base/content/calendar-month-view.xml
+++ b/calendar/base/content/calendar-month-view.xml
@@ -361,13 +361,13 @@
 
     <handlers>
       <handler event="mousedown"><![CDATA[
-        event.preventBubble();
+        event.stopPropagation();
 
         if (this.mDate)
           this.monthView.selectedDay = this.mDate;
       ]]></handler>
       <handler event="dblclick"><![CDATA[
-        event.preventBubble();
+        event.stopPropagation();
         this.monthView.controller.createNewEvent();
       ]]></handler>
     </handlers>
diff --git a/calendar/base/content/calendar-multiday-view.xml b/calendar/base/content/calendar-multiday-view.xml
index 8708f3e87c0..3033a63b23a 100644
--- a/calendar/base/content/calendar-multiday-view.xml
+++ b/calendar/base/content/calendar-multiday-view.xml
@@ -230,7 +230,7 @@
 
     <handlers>
       <handler event="mousedown" button="0"><![CDATA[
-        event.preventBubble();
+        event.stopPropagation();
         var whichside = this.getAttribute("whichside");
         if (!whichside)
             return;
@@ -238,7 +238,7 @@
         // we make assumptions about our position in the tree here;
         // specifically, this should get us to a <calendar-event-box>
         var evbox = this.parentNode.parentNode;
-        // still select it (since we'll preventBubble())
+        // still select it (since we'll stopPropagation())
         evbox.calendarView.selectedItem = evbox.mOccurrence;
         // then start dragging it
         evbox.parentColumn.startSweepingToModifyEvent(evbox, evbox.mOccurrence, whichside, event.screenX, event.screenY);
@@ -1399,7 +1399,7 @@
 
     <handlers>
       <handler event="mousedown" button="0"><![CDATA[
-        event.preventBubble();
+        event.stopPropagation();
 
         if (this.mEditing)
             return;
@@ -1443,7 +1443,7 @@
 
       <handler event="mouseover"><![CDATA[
         if (this.calendarView && this.calendarView.controller) {
-            event.preventBubble();
+            event.stopPropagation();
             onMouseOverItem(event);
         }
       ]]></handler>
diff --git a/calendar/base/content/calendar-view-core.xml b/calendar/base/content/calendar-view-core.xml
index 01821d82e77..862954126eb 100644
--- a/calendar/base/content/calendar-view-core.xml
+++ b/calendar/base/content/calendar-view-core.xml
@@ -234,7 +234,7 @@
       ]]></handler>
       <handler event="mouseover"><![CDATA[
         if (this.calendarView && this.calendarView.controller) {
-            event.preventBubble();
+            event.stopPropagation();
             onMouseOverItem(event);
         }
       ]]></handler>