Patch 4.0.6a (undocumented changes)

Druids

 * Tiger's Fury has a sound effect.

Dungeons

 * Blackrock Depths - Upper City
 * Attacking no longer aggroes other nearby mobs.
 * Sunken Temple
 * The death of no longer attracts the other dragonkin.

User interface

 * The Equipment Manager makes a sound if you switch gear.