rem: zoom = zoom - Math.log(this.map.maxResolution / (this.lzd/512))/Math.log(2); 
add: zoom = zoom - Math.log(this.maxResolution / (this.lzd/512))/Math.log(2); 
context:     getZoom: function () {        var zoom = this.map.getZoom();        var extent = this.map.getMaxExtent();        zoom = zoom - Math.log(this.map.maxResolution / (this.lzd/512))/Math.log(2);        return zoom;    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1027/42cb6b1fc346c7fff290eeba16ccef819093b98e/WorldWind.js/buggy/lib/OpenLayers/Layer/WorldWind.js