try

app/assets/javascripts/orbitdesktop.js

@@ -103,6 +103,7 @@ var orbitDesktop = function(dom){
 		var bindHandlers = function(){
 				var groupWrapperWidth = 0;
 				var groupWrapperHeight = 0;
+				$('div#desktop div.group').width(528);
 			$("div#desktop .element").mousedown(function(){
 				currentElement = $(this);
 				elementParent = $(this).parent();