diff --git a/lib/OpenLayers/Control/PanZoomBar.js b/lib/OpenLayers/Control/PanZoomBar.js
index d67030aa2c..bf153b41c2 100644
--- a/lib/OpenLayers/Control/PanZoomBar.js
+++ b/lib/OpenLayers/Control/PanZoomBar.js
@@ -167,6 +167,8 @@ OpenLayers.Control.PanZoomBar.prototype =
         this.mouseDragStart = evt.xy.clone();
         this.zoomStart = evt.xy.clone();
         this.div.style.cursor = "move";
+        // reset the div offsets just in case the div moved
+        this.zoomBarDiv.offsets = null; 
         OpenLayers.Event.stop(evt);
     },
     
diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index 2f86218672..816ee5399b 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -179,12 +179,13 @@ OpenLayers.Map.prototype = {
         this.viewPortDiv.appendChild(this.layerContainerDiv);
 
         this.events = new OpenLayers.Events(this, div, this.EVENT_TYPES, this.fallThrough);
-
         this.updateSize();
  
-    // Because Mozilla does not support the "resize" event for elements other
-    //  than "window", we need to put a hack here. 
-    // 
+        // update the map size and location before the map moves
+        this.events.register("movestart", this, this.updateSize);
+
+        // Because Mozilla does not support the "resize" event for elements other
+        // than "window", we need to put a hack here. 
         if (navigator.appName.contains("Microsoft")) {
             // If IE, register the resize on the div
             this.events.register("resize", this, this.updateSize);
@@ -633,6 +634,8 @@ OpenLayers.Map.prototype = {
     * "onresize" for an element)
     */
     updateSize: function() {
+        // the div might have moved on the page, also
+        this.events.element.offsets = null;
         var newSize = this.getCurrentSize();
         var oldSize = this.getSize();
         if (oldSize == null)
@@ -646,9 +649,6 @@ OpenLayers.Map.prototype = {
             for(var i=0; i < this.layers.length; i++) {
                 this.layers[i].onMapResize();                
             }
-            
-            // the div might have moved on the page, also
-            this.events.element.offsets = null;
 
             if (this.baseLayer != null) {
                 var center = new OpenLayers.Pixel(newSize.w /2, newSize.h / 2);