<solved> Checkout won't go to payment

[Sammer]

Hello,

 

I just updated my shop to 1.4.6.1 from 1.2.5.0.

All went pretty well apart from translations and the front design getting shot.

 

One curious problem I do have though is the problem that when placing an order the page will not go to the payment methods after selecting a shipping method. It just returns to the shipping page. Anyone have any idea what the problem can be?

 

<solved>

 

Switching to Single Page Checkout solved this problem.