add:  obj.tile = null;  
context:     clone: function (obj) {                if (obj == null) {            obj = new OpenLayers.Layer.WMS.Untiled(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        return obj;    },    
meta: 4411	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4411/06a7792891997bbf4a3167a536f6f50417cae078/Untiled.js/buggy/lib/OpenLayers/Layer/WMS/Untiled.js