Quote Originally Posted by strelitzia View Post
I'm having issues with checkout.
I get the message "Your order's details have changed. Please review the current values and re-submit."

I can confirm the start hash doesn't match the end hash, although the values in cart match those in checkout at the point of submitting the order.
No errors logged in the console.

Site is 1.5.7d with OPC v2.3.12. Template is a clone of Responsive Classic, but the issue also exists when trying template_default.

Any suggestions on where to start looking for the cause of this issue?
When you run the checker tool in the admin, what shows as different from the start to the ending hash?