Hi
read this post and if hikashop team say it not HKS problem try other ways ?
Utf8 is for storage file format . You could detect verify how is encode your file in each step . Some editor give us a way to verify that !!! It is low level but something to understand when deal with encoding charset/font-familly-style .
see
https://www.w3.org/International/questions/qa-byte-order-mark.en.php
see
notepad++
before load file in memory after save file in filesystem (after stream http )
see
encodingchecker.codeplex.com/
Hope it ll help
regard's