title: Additional shipping costs field not working
body: <p>so recently  I found out that my additional shipping costs field is not  working anymore.</p>
  
  <p>I can set and save value, but in frontend when customer puts item in to cart, a chceck shipping cost, nothing change.</p>
  
  <p>I ´m using shipping based on weight. Runnin 1.6.1.10</p>
  
  <p>Any idea what to do now?﻿</p>