diff --git a/lib/OpenLayers/Events.js b/lib/OpenLayers/Events.js
index cfed09feee..a825e72bab 100644
--- a/lib/OpenLayers/Events.js
+++ b/lib/OpenLayers/Events.js
@@ -5,7 +5,8 @@ OpenLayers.Events.prototype = {
     BROWSER_EVENTS: [
         "mouseover", "mouseout",
         "mousedown", "mouseup", "mousemove", 
-        "click", "dblclick"
+        "click", "dblclick",
+        "resize", "focus", blur"
     ],
 
     // hash of Array(Function): events listener functions
diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index 4410f15ae1..796c0411ef 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -85,10 +85,14 @@ OpenLayers.Map.prototype = {
 
         this.events = new OpenLayers.Events(this, div, this.EVENT_TYPES);
 
+        this.updateSize();
+        // update the internal size register whenever the div is resized
+        this.events.register("resize", this, updateSize);
+
         this.layers = [];
         
         if (!this.controls) {
-        this.controls = [];
+            this.controls = [];
             this.addControl(new OpenLayers.Control.MouseDefaults(), null );
             this.addControl(new OpenLayers.Control.PanZoom(),
                             new OpenLayers.Pixel(4,4) );
@@ -96,8 +100,6 @@ OpenLayers.Map.prototype = {
 
         this.popups = new Array();
 
-        this.updateSize();
-
         // always call map.destroy()
         Event.observe(window, 'unload', 
             this.destroy.bindAsEventListener(this));