If you move an object in the editor mode under any button the object disappears a bit. If you have placed that object it is shown under the button correctly.
http://img474.imageshack.us/img474/3204/editor4pt.jpg


The pin on the speedo disappers a bit under the rpm indicator.
That bug appears at these cars: XR GT, XR GT Turbo, RB4, XRR
http://img423.imageshack.us/img423/8293/untitled19he.jpg

Perhaps an other graphic format would help?