Tiny, unimportant forum glitch - FIXED
As it says is the title, this is really, really not a big deal or a big complaint. It's something that can wait until after all the other big forum work has been completed. I'm just posting it as an FYI, not a demand that it be fixed.
When using the classic skin, the icon for the grey skin doesn't work. All that you see under a user's name is a box with a red x and a text box saying something like "user selected AO grey skin" (or words to that effect).