We have noticed that customers which are still using the outdated software Joomla version 1.5 on their website may encounter encoding errors - "?" characters instead of special characters since our database software upgrade. In this case the fix can be easily applied by following the below-linked steps or by having us apply the fix to your website for a 15€+VAT flat fee.https://mariadb.com/kb/en/library/joomla-15-and-unicode-databse/ Please note that we strongly recommend not to use any outdated software and we again urge all customers using Joomla below the current version to upgrade or replace their website as able.