--- UI/WebServerResources/SchedulerUIDnD.js~	2010-03-31 04:02:48.000000000 -0700
+++ UI/WebServerResources/SchedulerUIDnD.js	2010-03-31 12:18:04.593333053 -0700
@@ -977,7 +977,7 @@ SOGoEventDragController.prototype = {
 
     onDragStart: function SEDC_onDragStart(event) {
         var target = getTarget(event);
-        if (target.nodeType == 1) {
+        if ((Event.isLeftClick(event)) && (target.nodeType == 1)) {
             if ((!this.eventCells
                  && (target.hasClassName("clickableHourCell")
                      || target.hasClassName("day")))