Checkout problem – Payment methods/freight costs doesn't refresh

Well the first thing you should do is fix your JS errors you’re having site wide. That is probably the cause of your issue.

This is not something I can help you with as I can’t see your code but if you use a dev tool like firebug or chrome tools, you can look at your console and it will show you what errors you’re having. I see two of them for your site.

Great help,

Can you see which scripts I should check?

… Or maybe guide me in firefox debug.

Or should I just replace them with an orginal file?

I can’t really understand why they doesn’t work, since I don’t think I have made any changes in them…

Most of the time is a theme issue. You can test it by changing your theme to 2012 and see if it works.

I’ve done that, and it works if I change the theme.

And that means that the errors in the scripts doesn’t really effect my issues since the errors in the JS files seems not to be located in the theme folder.

JS issues can come from anything…Themes, plugins…etc..

OK,

Do you have any idea where to start looking?

No idea…every theme is different…best ask your theme developer.