Quote Originally Posted by lat9 View Post
There's some kind of PHP-related error during the checkout; check your site's /logs sub-directory for additional information.
I have added additional payment method COD and it now allows to choose a payment method, but when clicking CONFIRM order, it recycles back to the cart with the message " Your order's details have changed. Please review the current values and re-submit."

No error log, no debug file.

webmaster tools - debugger displays no errors....

I'll PM you. May need some eyes on help.