Fixing collision issues

examples/collision/sprite vs group.php

@@ -7,7 +7,7 @@
 
 (function () {
 
-    var game = new Phaser.Game(800, 600, Phaser.AUTO, '', { preload: preload, create: create, update: update });
+    var game = new Phaser.Game(800, 600, Phaser.CANVAS, '', { preload: preload, create: create, update: update, render: render });
 
     function preload() {
 
@@ -88,6 +88,13 @@
 
     }
 
+    function render () {
+
+        game.debug.renderQuadTree(game.physics.quadTree);
+
+    }
+
+
 })();
 </script>