Bryan Garaventa sent this example to the Working Group, which uses the already-weird ARIA tooltip pattern, but with dynamically changing pointers to different tooltip elements. I'm not sure this is a common or recommended usage (I'd recommend a live region in this case) but it's possible there is something in here we can or should to to make work better. http://whatsock.com/test/dt_demo/Coding%20Arena/Inline%20Form%20Field%20Validation%20and%20Dynamic%20Help%20Tooltips/Dynamic%20Help%20Tooltip/demo.htm
<rdar://problem/16519941>
Nevermind. He's already changed the test case example. Closing.