Rightjs Core

When I use Tooltip module inside Billboard I get error:
TypeError: d.find is not a function (Trying in Firefox 14)
and tooltips certainly not works

html structure is very simple, I use default options:

<ul class="rui-billboard">
  <li>
   <a href='...'>
    <img data-tooltip='' alt='<p>my tooltip</p>' src="..." />
   </a>
  </li>
</ul>

All neeeded libraries of RightJS connected in header