GUI cursor position off

Hi, I'm overlaying a GUI texture to the position of the mouse. However, the actual click point, the end of the cursor, is off by a little to the left and up of my actual texture. How do I fix this?

Here's my script:

function Start() {
    Screen.showCursor = false;

function OnGUI() {
    var mousePos : Vector3 = Input.mousePosition;
    var pos : Rect = Rect(mousePos.x,Screen.height - mousePos.y,cursorImage.width,cursorImage.height);

You need to offset the rect by half the width and height:

var pos : Rect = Rect(mousePos.x - cursorImage.width / 2.0, Screen.height - mousePos.y - cursorImage.height / 2.0, cursorImage.width, cursorImage.height);