Russian photographer Sergey Kuznetsov ( published an interesting set of photos of the Yuri Dolgorukiy submarine - some photos are taken by him, some are provided by Sevmash.

Among other things, one of the images (on the left) shows that the submarine has a set of 16 launch tubes - this is what Russia declared in a START MOU back in 2007. Russian media, however, still often report that the submarine will carry 12 missiles. (Well, technically it is possible to keep four launchers empty, but I cannot imagine why anybody would do that.)