Pullups for 2.3:

svn merge svn.openlayers.org/trunk/openlayers/@2230 svn.openlayers.org/trunk/openlayers/@2233 svn.openlayers.org/branches/openlayers/2.3/
#480   Grid funkiness
#491   improper URL encoding of LAYERS list in WMS GetMap request
#500   layer.destroy() should remove itself from the map but not set new baselayer


git-svn-id: http://svn.openlayers.org/branches/openlayers/2.3@2234 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/grid_inittiles.html

@@ -11,7 +11,7 @@
     <script type="text/javascript">
         <!--
         function init(){
-            map = new OpenLayers.Map('map', {'maxResolution': 1.40625/2, tileSize: new OpenLayers.Size(256,256)});
+            var map = new OpenLayers.Map('map', {'maxResolution': 1.40625/2, tileSize: new OpenLayers.Size(256,256)});
             ww = new OpenLayers.Layer.WMS( "Basic", 
             "http://labs.metacarta.com/wms-c/Basic.py?", 
             {layers:"basic"});