Well. Ooops. Apparently it was Aberforth--assuming he's the one in the photo with Dumbledore. But you have to admit, given the circumstances, Ludo Bagman was a good guess.
Also, dude, the Ron stuff is not cool. At least with the Lupin stuff...Harry was right, even though it sucks that he was right.
But really...I guess we're not going to get through a single book without the kids having some major division between them. Even if hopefully this was caused by the locked possessing Ron...meh. And I don't think it is.