UPDATE: The patch notes have already been updated. You can read the latest patch notes after the jump.
Blizzard has released the PTR patch notes for patch 4.0.6. Check out the full list after the jump to see how your class has been affected, and remember that these notes can change as the patch is tweaked on the test realm.
You can discuss the upcoming patch in this thread in our World of Warcraft general forum. What are your thoughts on the changes?