Blizzard has rolled out Diablo III's v1.0.5 to their public test realm, and the always epic (or should I say, legendary) list of changes can now be found over in this official blog post
As has been mentioned in recent weeks, the biggest changes this time around are numerous tweaks to defensive skills across all classes and reductions in monster attack damage that will purportedly result in greater survivability.
The new Monster Power system also kicks off with this patch, implementing a manner of player-adjustable monster difficulty for scaling loot returns (more details on that here
), as well as a new event titled Infernal Machine, where players can access a portal to some new double boss battles with greater chances of hot loot drops.
Hit up the PTR 1.0.5 patch notes
for the complete run down.