if you click Yaohoo's placeholder
Ah, there is the problem.
When I load the page, I see the "spinner" & never clicked anything.
Instead I went to the Blocked Objects menu, Allowed shockwave-flash@http://l.yimg.com.
Then refreshed the page.
With that, it works.
If I "click" Yahoo's "placeholder" first (at that point, the Blocked Object menu disappears) , then on the next click I'll get the ClearClick warning & then the clip will not play.