app/assets/javascripts/highcharts/themes/skies.js in highcharts-rails-3.0.5 vs app/assets/javascripts/highcharts/themes/skies.js in highcharts-rails-3.0.6

@@ -7,10 +7,10 @@
 	colors: ["#514F78", "#42A07B", "#9B5E4A", "#72727F", "#1F949A", "#82914E", "#86777F", "#42A07B"],
 	chart: {
 		className: 'skies',
 		borderWidth: 0,
 		plotShadow: true,
-		plotBackgroundImage: '/demo/gfx/skies.jpg',
+		plotBackgroundImage: 'http://www.highcharts.com/demo/gfx/skies.jpg',
 		plotBackgroundColor: {
 			linearGradient: [0, 0, 250, 500],
 			stops: [
 				[0, 'rgba(255, 255, 255, 1)'],
 				[1, 'rgba(255, 255, 255, 0)']