I found a very critical shipping-bug!
We tested it on 12 different Joomshopping-Shops and it's the same everywhere:
I put something with the weight of 0.5kg (~1 lb) into my Basket. Then i proceed to Step 5 of the order. So the final step before accepting the TOS and clicking "BUY". I open a new Tab in Firefox and put something else with p.a. 40kg (~80 lb) into my basket.
Then i return to the tab where my order is at Step 5 already. I press F5 (refresh browser without clearing cache) and the new article with 40kg appears. All prices and tax were recalculated but NOT the shipping!
What to do??