Board Thread:Support Requests - Getting Technical/@comment-25151125-20140729044016/@comment-452-20140729115212

To answer your question,  span.Tooltip span{display: none; }  is why it doesn't work.

To fix this, change span.Tooltip span{display: none; } to  span.Tooltip span.TooltipInner{display: none; } and span.Tooltip:hover span to span.Tooltip:hover span.TooltipInner and the template to:

Personally, I now use ReferencePopups where I used to use a tooltip template, but to each their own.