It Really Is Everywhere

Just noticed a  small detail of the interface on WordPress, the blogging platform that underlies Polaroidland. On the comments administration page (where I shovel out the spam and junk mail once a day) each comment has a spot for an avatar, the small photo or icon that appears next to the writer’s name. If you don’t have one, WordPress displays a dummy image when I mouse over that space, and it looks like this:

I swear I’ve seen that white border somewhere before. Can’t quite place it, though. Give me a minute.