We have made a fix to the 'admin_users_birth_greetings.php' file after release 3.2 has been issued.
 
Description.
Birthday greetings notifications did not work properly.
 
Solution.
Please, download an updated version of the 'admin_users_birth_greetings.php' file from here:
http://www.viart.com/downloads/admin_users_birth_greetings-3.2.zip
Then extract the fixed file into the 'admin' 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.