We have made a fix to the 'user_product.php' file after release 3.2 has been issued.
 
Description.
There was a problem with new records for merchants if the field 'Stock Level' is selected not to be shown for merchants
 
Solution.
Please, download an updated version of the 'user_product.php' file from here:
http://www.viart.com/downloads/user_product-3.2.zip
Then extract the fixed file into the root 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.