Suffer, mortals, as your pathetic mod betrays you! Come patch 3.3.5, Blizzard is disabling the functionality of the ultra-useful Augmented Virtual Reality (AVR) addon. The popular mod allows three-dimensional images to be shared between party members in real time to aid in raid strategy and positioning. It is perhaps best known for making the Sindragosa encounter a snap during the ice blocking phase (and, of course, for sharing crudely drawn pictures of genitalia).
Blizzard poster Bashiok broke the news of AVR's impending demise, citing its invasive nature and the fact that it takes away from the need for on-the-spot decision making:
The full announcement after the break.