code: function(err){
  			var indicator = lib.node(this._prefix+this._id);
  			indicator.parentNode.removeChild(indicator);
  			
  			var image = document.createElement("img");
  			image.src = require.toUrl("images/problem.gif");
  			this._anchor.appendChild(image);
  			
  			new mTooltip.Tooltip({
  				node: indicator,
  				text:err
  			});
  		}
docs: [interface] renders the progress indicator after an population error