This menu highlights 'bugs' in Chrome, Safari and Opera where an element with a border radius still registers a hover when the mouse is placed outside of the border radius but still inside the original rectangular border.
The only browsers that limit the hover to the border radius are Firefox and IE9+. I think that it is about time the other browsers fixed this bug as it has been around for over a year.
Hover the corner 'Menu' to slide in the sub menu, then move to the items in the sub menu to slide in a further sub level.
The animation will be seen in Firefox, Opera, Safari, Chrome and iPad etc., with IE9 and IE10 seeing an instant appearance of the sub levels. It may be that when IE10 has its official release it too will support transitions and see the full animation.
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