add:  if (options['tileSize']) { this.tileSize = options['tileSize'].copyOf(); } else { this.tileSize = new OpenLayers.Size(256, 256); } 
context:     initialize: function(name, url, params, options) {        var newArguments = new Array();        if (arguments.length > 0) {            //uppercase params            params = OpenLayers.Util.upperCaseObject(params);            newArguments.push(name, url, params, options);        }        OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);        OpenLayers.Layer.Markers.prototype.initialize.apply(this, newArguments);            if (arguments.length > 0) {            OpenLayers.Util.applyDefaults(                           this.params,                            OpenLayers.Util.upperCaseObject(this.DEFAULT_PARAMS)                           );        }    },    
meta: 8310	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8310/e7b45c4731f24a0a962215ab51edd44195d75fe3/WFS.js/buggy/lib/OpenLayers/Layer/WFS.js