I cannot reproduce this here. Perhaps, you are expecting something else from this preference? The setting should give you a large crosshair for the mouse cursor when in snapping mode (e.g. when drawing a line, etc).

If you cannot solve it, could you post a screenshot while drawing lines? Thanks.

Ah, that's weird it's working again now.

OK, thanks. Perhaps, you accidentally ticked the wrong cross hair preference (for the absolute zero point).