Hi Karol,
Thanks for your reply.
I modified the css by replacing the full path of the gif file with its Base64 equivalent.
The gif file is not displayed in Design Studio, nor when I execute it in local mode, nor on the platform.
In the DOM Explorer (F12 in IE11), I see that "background-image" has a strike-through, see this sreenshot :
Do you know what the reason can be ?
thanks
Hans