So Shoigu was replaced by Andrey Belousov in the seat of the Minister of Defence. Might be related to this: >>51906 since that guy was Shoigu's second.
Shoigu was moved to Security Council of Russia, where he is the Secretary now, which might be the third position in that institution (first is Putin as Chairman, second is Medvedev as Deputy Chairman) - the other members are the heads of various other institutions (like the government and ministry of defense and whatnot).