Opacity in IE of a Label.

[Sytematic]

Hello,

Using Smart GWT 3.0 Power.

It seems that the following code of a draggable/resizeable semi transaprent label, is rendered opaque in Internet Explorer.
Since it is using the setOpacity API, I thought it should be working. What am I missing?

public class DragLabel extends Label {
	public DragLabel(int width, int height) {
		setAlign(Alignment.CENTER);
		setPadding(0);
		setWidth(width);
		setHeight(height);
		setShowEdges(false);
		setKeepInParentRect(true);
		setCanDragReposition(true);
		setCanDragResize(true);
		setDragAppearance(DragAppearance.TARGET);
		setOpacity(50);
		setBackgroundColor("#ffffff");
		setBorder("2px solid #000");
	}
}

If this is not a bug, what is the best way to come around this? I kinda need the semi-transparantness.

[Isomorphic]

See the IEFilters overview in the docs package.