Can't change file / folder icons in Vista

Hi all,
I've tried changing the folder icon on my system by going into Settings > File Types. The problem is that any changes I make don't have any effect for folders, but they do for files.

I've tried rebooting, and applying the same settings on my laptop, but still no go. In the file type dialog it seems to indicate the icon has changed but in the lister it actually hasn't. Changes to other things (such as context menus and tooltips) work ok.

Does anyone know where the problem is?

Regards,
Kyokan

FAQ: Change the default folder icon in Opus.

Ah, many thanks Leo. Should have known!