This only forces the client which encoding to use to interpret and display the characters. But the actual problem is that you're already sending ’ (encoded in UTF-8) to the client instead of ’. The client is correctly displaying ’ using the UTF-8 encoding.
I'm not certain when this first occured. I have a new drop-shipping affiliate website, and receive an exported copy of the product catalog from the wholesaler. I format and import this into Prestashop 1.4.4. The front end of the website contains combinations of strange characters inside product text: Ã, Ã, ¢...
