Brief
We have modified the 'order_items.php' file after release 3.3.2 has been issued.
Description.
The points were not subtracted from the user's account if the reward points amount was not specified.
Solution.
We would recommend to download an updated version of the files from here:
http://www.viart.com/downloads/order_items-3.3.2.zip
Further, extract the above mentioned file into the 'includes' folder of your shop replacing an existing one. Don't forget to make a backup copy of the current file in case something goes wrong.