rem: this.clear(); 
add: this.drawn = false; 
context:     moveTo: function (bounds, position, redraw) {        if (redraw == null) {            redraw = true;        }        this.clear();        this.bounds = bounds.clone();        this.position = position.clone();        if (redraw) {            this.draw();        }    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1027/c28f13f88d7a25c8f5c3b8dbe5e1b22a896e5336/Tile.js/buggy/lib/OpenLayers/Tile.js