After adding products to cart and continue to checkout, i sign in throught the login popup, choose payment/shipping method and when i click to continue my order to finalize it a get this javascript alert:
Adrress errors
Confirmation password does not match the password!
And one more thing...
After redeem a coupon and click to coninue it won't check if coupon already used by customer (if max use is set to 1) or if any more coupons available to public!