I can't find out any information about this but in general (up until now) when I visited an image directly on the server it displayed it on the bland default white background in the top-left corner (really annoying, always planned to fix it at some point somehow.)
But NOW, it displays centered in a trendy dark background, which is awesome and I really like. Anyone else? Is it a server update? It's awesome whatever it is!
Here's an example of what I mean: