Sign of MouseEvent.MOUSE_WHEEL delta is inverted

What steps will reproduce the problem?

var sprite = new Sprite();
sprite.graphics.beginFill(0xff0000);
sprite.graphics.drawRect(0, 0, 100, 100);
sprite.graphics.endFill();
sprite.addEventListener(MouseEvent.MOUSE_WHEEL, onMouseWheel);
addChild(sprite);

function onMouseWheel(event:MouseEvent)
{
    trace(event.delta);
}

What is the expected output? What do you see instead?
Expected (like in flash):
-1 - scrolling wheel to self
1 - scrolling wheel from self
Result:
1 - scrolling wheel to self
-1 - scrolling wheel from self

What version of the product are you using? On what operating system?
nme 3.2.0, target: windows, OS: Windows XP

Original issue reported on code.google.com by cse...@gmail.com on 12 Mar 2012 at 5:43

weimingtom / nekonme

Sign of MouseEvent.MOUSE_WHEEL delta is inverted #207