Upcoming patch 2.2 has hit the PTRs, serving mostly as a rather massive bugfix patch rather than a serious content update. Among the bigger changes are:

" Resilience Rating: The reduction to the percent chance to get a critical strike now also reduces the damage dealt by damage over time effects by the same percentage.
" Power Regeneration: Any effect which triggers a change in your rate of power regeneration (Mana, Rage, Energy, Focus) will now cause an immediate reward of some power at the old rate of increase, and then begin new "ticks" of power at the new rate approximately 2 seconds later. This was done to improve functionality of abilities such as Evocation and Innervate so that they did not have wasted "ticks".
" Aspect of the Viper: This ability has received a slight redesign. The amount of mana regained will increase as the Hunter's percentage of mana remaining decreases. At about 60% mana, it is equivalent to the previous version of Aspect of the Viper. Below that margin, it is better (up to twice as much mana as the old version); while above that margin, it will be less effective. The mana regained never drops below 10% of intellect every 5 sec. or goes above 50% of intellect every 5 sec.
" Blessing of Kings, Light, Might, Salvation, Sanctuary and Wisdom increased to 10 minutes.
" Greater Blessing of Kings, Light, Might, Salvation, Sanctuary and Wisdom increased to 30 minutes.
" Blind duration reduced to 8 seconds, cooldown reduced to 1 minute, Blinding Powder is no longer required to use.
" Mac Movie Capture: the Mac client can now capture in-game video to QuickTime movie files using a configurable choice of codec (H.264, Motion JPEG, or Pixlet), resolution, and frame rate. Two new entries have been added to the Key Bindings dialog for start/stop recording and for cancellation of a recording. For more detailed configuration options please see the Mac Options panel in game. Mac OS X 10.4.9 and QuickTime 7.1.6 or better are required. Not all machines have enough performance to smoothly capture video at high frame rates; end user experimentation will be required to find appropriate settings for each system.

Alongside the variety of class fixes there are a wide variety of various item and bug fixes.

The full notes can be found here.