Resize transitions by default

lib/OpenLayers/Layer/Grid.js

@@ -96,16 +96,16 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
      * {String} The transition effect to use when the map is zoomed.
      * Two posible values:
      *
-     * null - No transition effect (the default).
      * "resize" - Existing tiles are resized on zoom to provide a visual
      * effect of the zoom having taken place immediately.  As the
      * new tiles become available, they are drawn over top of the
-     * resized tiles.
+     * resized tiles (this is the default setting).
+     * null - No transition effect.
      *
      * Using "resize" on non-opaque layers can cause undesired visual
-     * effects. This is therefore discouraged.
+     * effects.  Set transitionEffect to null in this case.
      */
-    transitionEffect: null,
+    transitionEffect: "resize",
 
     /**
      * APIProperty: numLoadingTiles