Paypal Error code 15008

after upgrading to 1.2.3 pro, on more than one occasion, when a coupon code is applied, this causes the paypal error code 15008 to occur.


Error Code 15008: Invalid Data

This transaction has been completed, but the total of items in the cart did not match the total of all items.

I am not sure why this is now occurring, but I need it to stop. This is costing me sales.

If we do not use a coupon code, then the order processes just fine. It must be the coupon functionality and how it affects the cart that is causing the issue.

Please advise...

I cannot produce the problem using paypal pro or paypal standard and using coupons. Is there a specific case that causes this? Details would be helpful such as what is put in the cart, costs, coupon details, and payment processor (pro or standard).

when the issue comes up again, i will post this information

looks like it is a known paypal issue:
https://www.x.com/thread/47022