Weird z-index issue in IE9

[ghost]

I suspect the problem I'm having is related somehow to z-index, but I'm not sure.
Using Chrome, please take a look at this website: http://develop-datasupriweb.vtexcommerce.com.br/

I'm using the blueberry slider in it. On top of the slider, I've absolutely positioned a DIV and set its z-index to a high number, 60. It works fine on Chrome. But on IE9, the DIV flickers whenever a transition happens. However, hovering the mouse over the area where the DIV should be correctly triggers the cursor change to "pointer".

I have no idea how to solve it and I'm positive it has something to do with the slider.