ListGrid.getGridRenderer().setBackgroundColor(null) not behaving as expected in IE11.

Hello,

We can set the background color of the grid by calling ListGrid.getGridRenderer().setBackgroundColor("some color"), however, if we want to reverse that change and go back to the default background color by calling ListGrid.getGridRenderer().setBackgroundColor(null), that does not work in IE11. The previously set background color remains.

This works perfectly in Chrome and FF. I don't recall this being a problem in IE11 before either, just noticed this happening now.

SmartClient Version: v9.1p_2014-10-22/Pro Deployment (built 2014-10-22)

Thanks