Get rid of the arrow-{up,down,left,right} usage in KHTML by using the style arrows for drawing the mouse scroll indicator.

However, this still makes the indicator not appear -
I can see it shining through (occasional one-pixel shifts make it look like transparent glass) but it's not drawn with a visible color obviously. No idea which brush, composition mode or whatever is to blame for this.

Also, use two more appropriate icon names.