fix issue with orientation changes on mobile devices (tested on Motorola Xoom 2 with Android 3.2.2 in the stock browser)

lib/OpenLayers/Map.js

@@ -588,8 +588,13 @@ OpenLayers.Map = OpenLayers.Class({
             // Else updateSize on catching the window's resize
             //  Note that this is ok, as updateSize() does nothing if the 
             //  map's size has not actually changed.
-            this.updateSizeDestroy = OpenLayers.Function.bind(this.updateSize, 
-                this);
+            var me = this;
+            // We need to call this in the next cycle, otherwise it can cause
+            // issues on mobile devices on orientation change. It will use the
+            // height of the previous orientation otherwise.
+            this.updateSizeDestroy = function() {
+                window.setTimeout(function() { me.updateSize(); }, 0);
+            };
             OpenLayers.Event.observe(window, 'resize',
                             this.updateSizeDestroy);
         }