diff --git a/lib/OpenLayers/Layer/Grid.js b/lib/OpenLayers/Layer/Grid.js
index b890c632e9..a511954ea0 100644
--- a/lib/OpenLayers/Layer/Grid.js
+++ b/lib/OpenLayers/Layer/Grid.js
@@ -148,7 +148,9 @@ OpenLayers.Layer.Grid.prototype =
             } else {
                 if (!this.grid || zoomChanged) {
                     this._initTiles();
-                } else { 
+                } else if (this.getGridBounds().containsBounds(bounds, true) == false) { 
+                    this._initTiles();
+                } else {
                     var i = 0;
                     while (this.getGridBounds().bottom > bounds.bottom) {
                        this.insertRow(false);