I have a WebMenu on my page and it basically just loads a series of DefaultImageUrl's but it is giving me some strange layout problems as shown below in this picture.

Now if I hoover my mouse of those affected items they correct themselves. But it is obviously something todo with the lag in loading the images. Is their any event that fires that I can say refresh / Invalidate the menu so it re-renders it self once the client has downloaded all the menu items. This was a simple javascript menu that I replaced with your web menu prior which is also why I am using the original images for the nav menu. Any help would be appreciated. Thanks