Hello,
I am seeing a change in vm 3.0.9.4 that seems to be adversely affecting coupons. In the front end after entering the coupon, it does not show until I refresh the cart screen. I did a file compare of 3.0.9 and 3.0.9.4 and found that this change affected it:
www/components/com_virtuemart/controllers/cart.php, line 82
<?php
$cart->prepareCartData(false);
?>
changing it back to this fixed the problem
<?php
$cart->prepareCartData();
?>