mgr.itemStart, then img.src = ... (browser cache)

src/loaders/ImageLoader.js

@@ -59,10 +59,10 @@ THREE.ImageLoader.prototype = {
 
 		if ( this.crossOrigin !== undefined ) image.crossOrigin = this.crossOrigin;
 
-		image.src = url;
-
 		scope.manager.itemStart( url );
 
+		image.src = url;
+
 		return image;
 
 	},