rem: this.map.setCenter(olCenter, yZoom - 1); 
add: this.map.setCenter(olCenter, 16 - yZoom); 
context:     catchPanZoom: function(e) {         var olCenter = this.getYMapCenter();        var yZoom = this.ymap.getZoomLevel();        this.map.setCenter(olCenter, yZoom - 1);            },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1027/6392e9877c9cbbba83824e6512ecabb2d5e5edaa/Yahoo.js/clean/lib/OpenLayers/Layer/Yahoo.js