Hand cursor (cursor:hand) disappears with IE9

I noticed on FF and on IE 7 and 8, if you hover over a tree the cursor changes to the “hand” pointer, but on IE 9 the cursor doesn’t change.

Is this a browser change or is there something I need to enable in my code to continue this behavior?

Can’t reproduce locally.
Could you provide completed demo with this issue? Or you’ve tried on our online samples?