Cross Browser issues
This works great and addresses the main reason why I stopped using Spry to validate my form fields - the positioning of the message would often break the layout of the page.
This is very cool and work beautifully... in IE 8.
When tried on Safari (mac and pc) or Firefox (v3) it does not show the tooltip. Upon closer look it does show the very tip of the arrow of the tool tip at the top left of the page.
Any ideas why or what can be done to make it work across all browsers? See this link for the example.