rem:  obj.grid = null; 
add:  obj.grid = new Array(); 
context:     clone: function (obj) {                if (obj == null) {            obj = new OpenLayers.Layer.Grid(this.name,                                            this.url,                                            this.params,                                            this.options);        }        //get all additions from superclasses        obj = OpenLayers.Layer.HTTPRequest.prototype.clone.apply(this, [obj]);        // copy/set any non-init, non-simple values here        if (this.tileSize != null) {            obj.tileSize = this.tileSize.clone();        }                // we do not want to copy reference to grid. that should stay at null        obj.grid = null;        return obj;    },    
meta: 4411	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4411/7129233dea34e454d115acfca3b7a92303843402/Grid.js/buggy/lib/OpenLayers/Layer/Grid.js