CSS cursor:pointer in mac Safari doesn't work

I have placed cursor:pointer on a td but in Safari (on a mac) it only displays the default mouse cursor instead of changing to the little hand pointer which it does in every other browser.

Is anyone aware if there is a fix for this or is it unavoidable?

Update: The code is something like this:

HTML

<td class="someClass"><span>text here</span></td>

CSS

td.someClass { cursor:pointer; }