app/assets/javascripts/highcharts/modules/drilldown.js in highcharts-rails-4.0.1 vs app/assets/javascripts/highcharts/modules/drilldown.js in highcharts-rails-4.0.3

@@ -15,10 +15,11 @@
 	var noop = function () {},
 		defaultOptions = H.getOptions(),
 		each = H.each,
 		extend = H.extend,
 		format = H.format,
+		pick = H.pick,
 		wrap = H.wrap,
 		Chart = H.Chart,
 		seriesTypes = H.seriesTypes,
 		PieSeries = seriesTypes.pie,
 		ColumnSeries = seriesTypes.column,
@@ -75,10 +76,10 @@
 		.attr({
 			opacity: 0.1,
 			visibility: 'inherit'
 		})
 		.animate({
-			opacity: 1
+			opacity: pick(this.newOpacity, 1) // newOpacity used in maps
 		}, animation || {
 			duration: 250
 		});
 	};