Michael Bisping's controversial win over Anderson Silva bumped him way up in the middleweight rankings.
The UFC's return to London featured one of the stranger main events in recent history, with Michael Bisping nearly getting knocked out looking for his mouthpiece but going on to win a unanimous decision over Anderson Silva. That was really all there was relevance-wise on the show from a rankings standpoint, but that result did cause a big shift in the middleweight ladder.
In addition, an injury apparently has led to a champion sliding down the pound-for-pound rankings a bit.