You may recall a while back that we covered the problem with bear tanks in Wrath of the Lich King. In short, the new shared gear itemization between Rogues and Feral Druids is leaving bear Druids incredibly starved for armor and stamina. Extra stamina and armor is wasted on rogues, but is mandatory for Bears. Bears, therefore, have suffered.
Ghostcrawler has now let us know that the dev team has noticed the problem. The justification, of course, is as usual: They want less useless stuff to drop. Ideally, itemization should be tight enough that there is a high chance of people getting stuff they can use off a boss, even if that means 12 other people in the raid can use it as well.