Vista - User folder icons behaving oddly

These are not the folder icons inside the User folders, but in the folder called 'Users' itself.

A picture is a thousand words:


Album art appears on my user folder, but the other user folders remain using the generic folder within folder Vista icon. I've tried all icon settings on the folder with the art but it remains the same no matter what.

Just to clarify, my goal is to get the odd user folder with album art to a generic double folder Vista icon like the others.

P.S. That particular art is from the Ting Tings.