The appearance of little green dots on many, not all, of the images in the sidebar popup chat area.
They aren't on friends of mine. Are these people being marked for some sinister plan? Have they been chosen, anointed? Does the dot mean, "this person has money"? Nope, can't be. I notice my own pic has a green dot on it.
Feel free to add your own favorite delusional and/or paranoid fantasy here as a comment. Or you can be a total downer and tell me the truth, an involved and boring explanation, I'm sure. Wild irrational speculation is much more popular these days.