I was in chat yesterday and every now and then the interface starts going loopy Mike ( Chat moderator ) told me it happens when a picture has been posted or there is heavy traffic ( there were 7 of us )
A refresh (F5) clears the problem... Killivolt was on a mac, so he doesn't have an F5 key and kept on logging out and back in to clear it.
That happened to me a while ago. Usually it happens when someone posts a non-image link inside image tags. If you're in chat now I'll log in and show you what I mean.
EDIT: It appears this only happens in Chrome. Firefox works fine, but Chrome displays a broken image icon and the chat gets jumpy.