Aceshop 3.0.1 and 3.0.2. Bug during checkout, but not always

Hi

I found a bug with Aceshop 3.0.1 or 3.0.2 and I need to know if it happens to someone else.

Sometimes, you can´t finish checkout process and you get this message "Shipping method required!" if you reload the page few times with F5 you can finish the order, but you must do that. It happens with a brand new Joomla 2.5.11 installation and new Aceshop 3.0.1 or 3.0.2

The staff of Aceshop found that error but they say it´s a server problem, but we tried different server configurations, we even checked in another host provider, but we still get that problem. They are working on it, but days go by and my customers call us desperate to say the can´t finish the order, and we are desperate too ´cos we wrote first ticket on 12.05.2013 and we still are waiting for a solution.

I found similar topics in the forum but we can´t solve it with those solutions.

I see in Mijoshop changelog they had this issue (or similar) and they solved last month, so please, if you have Aceshop 3.0.1 or 3.0.2, try to finish a demo order, if you can go to step 6 don´t finish the order, reload the page and try again, you must get one error every 4 or 5 times.

Thanks