Taken from:
http://d3db.com/news/id/268-datamined-10310057-patch-notes-unofficial/Changes that aren't uncoverable through the data files like the Inferno re-tooling, repair costs and drop rate updates are NOT listed below, but WILL be in the patch! For a full explanation of non-technical changes that will be in the patch, please refer to the 1.0.3 design preview posted last week.
Skills
The only changes to the Witch Doctor and Monk were rewording or fixing typos for clarification / readability.
Barbarian
Overpower
Crushing Advance
The tooltip has been updated to indicate that it redirects ranged damage in addition to melee now.
Relentless
Rather than skills costing no fury, they now cost 75% less fury.
Weapon Throw
Throwing Hammer
The tooltip has been updated to display the correct value of 1.5, it was previously rounding up to 2.
Demon Hunter
Cluster Arrow
Dazzling Arrow
The damage type is now Physical.
Grenades
Stun Grenades
The tooltip has been updated to display the correct value of 1.5, it was previously rounding up to 2.
Wizard
Meteor
Star Pact
The damage type is now Arcane.
Paralysis
The tooltip has been updated to display the correct value of 1.5, it was previously rounding up to 2.
Enchantress
Mass Control
The range of this ability has been reduced from 15 to 8 yards.
Combat
Frenzied shrines have been updated to no longer provide a crit bonus.
Siegebreaker, Zoltun Kulle and Belial now have enrage timers and a new ability when they are enraged.
Items
The attack speed affix has been reduced significantly on all items. The following list outlines all of the previous values and new values for each affix level. This should give you a rough idea of how much IAS you should expect to lose.
UPDATE: IAS on Quivers appears to be unchanged, I checked a few (including Dead Man's Legacy) and they retained their pre 1.0.3 values.
Weapons
Haste 1: Old: (2-3%) New: (2%)
Haste 2: Old: (4-5%) New: (2%)
Haste 3: Old: (6-7%) New: (2-3%)
Haste 4: Old: (8-9%) New: (2-3%)
Haste 5: Old: (10-11%) New: (3-4%)
Haste 6: Old: (12-13%) New: (3-4%)
Haste 7: Old: (14-15%) New: (5%)
Haste 8: Old: (16-17%) New: (6-7%)
Haste 9: Old: (18-19%) New: (8-9%)
Haste 10: Old: (20-25%) New: (10-11%)
Other Types (Rings, Amulet, Gloves, Legendaries)
Haste 1: Old: (2-3%) New: (2%)
Haste 2: Old: (4-5%) New: (2-3%)
Haste 3: Old: (6-7%) New: (3-4%)
Haste 4: Old: (8-9%) New: (3-4%)
Haste 5: Old: (10-11%) New: (4-5%)
Haste 6: Old: (12-13%) New: (5-6%)
Haste 7: Old: (14-15%) New: (6-7%)
Haste 8: Old: (16-17%) New: (8-9%)
Crafting
Jeweler
Crafting fees for the following gems have been updated, in addition, the following combines only require 2 gems (down from 3). The crafting fees and gem requirements for levels above Flawless Square were not changed.
Flawless Square: 100g (previously 20,000g)
Square: 85g (previously 7,500g)
Radiant: 70g (previously 3,500g)
Perfect: 55g (previously 2,000g)
Flawless: 40g (previously 1,250g)
Normal: 25g (previously 750g)
Flawed: 10g (previously 500g)
Blacksmith
Crafting fees and reagent requirements for many recipes have been reduced. We've listed all of the new costs of the inferno recipes below (those that are learned outside of training). The Exalted Grand recipes have not changed in cost or material requirements.
Exalted: Behemoth, Doomcaster, Mythical Staff, Oni Blade, Phantom Bow, Sagaris, Slag Hammer, Zhezl
Now requires 42,036g, 23 Exquisite Essences, 3 Iridescent Tears, 7 Tome of Secrets
Down from 97,180g, 29 Exquisite Essences, 7 Iridescent Tears, 8 Tome of Secrets
Exalted: Conquest Sword, Crag Hammer, Dread Shield, Galraki, Golden Talon, Impellor, Massacre Axe, Orbit Stones, Piercer, Runic Quiver, Strike Wand, Unspeakable Thing
Now requires 40,680g, 20 Exquisite Essences, 3 Iridescent Tears, 6 Tome of Secrets
Down from 94,920g, 27 Exquisite Essences, 7 Iridescent Tears, 8 Tome of Secrets
Exalted: Pallium
Now requires 29,832g, 14 Exquisite Essences, 3 Iridescent Tears, 4 Tome of Secrets
Down from 49,720g, 14 Exquisite Essences, 3 Iridescent Tears, 4 Tome of Secrets
Exalted: Sovereign Mail, Sovereign Helm
Now requires 31,188g, 18 Exquisite Essences, 3 Iridescent Tears, 5 Tome of Secrets
Down from 51,980g, 18 Exquisite Essences, 3 Iridescent Tears, 5 Tome of Secrets
Exalted Fine: Behemoth, Doomcaster, Mythical Staff, Oni Blade, Phantom Bow, Sagaris, Slag Hammer, Zhezl
Now requires 59,768g, 32 Exquisite Essences, 4 Iridescent Tears, 10 Tome of Secrets
Down from 134,719g, 41 Exquisite Essences, 8 Iridescent Tears, 12 Tome of Secrets
Exalted Fine: Conquest Sword, Crag Hammer, Dread Shield, Flesh Ripper, Galraki, Golden Talon, Impellor, Massacre Axe, Orbit Stones, Piercer, Runic Quiver, Strike Wand, Unspeakable Thing
Now requires 57,840g, 29 Exquisite Essences, 4 Iridescent Tears, 8 Tome of Secrets
Down from 131,586g, 38 Exquisite Essences, 8 Iridescent Tears, 11 Tome of Secrets
Exalted Fine: Armplates, Heaven Strand, Pallium
Now requires 42,416g, 20 Exquisite Essences, 4 Iridescent Tears, 6 Tome of Secrets
Down from 68,926g, 20 Exquisite Essences, 4 Iridescent Tears, 6 Tome of Secrets
Exalted Fine: Sovereign Helm, Sovereign Mail, Sovereign Tassets
Now requires 44,344g, 25 Exquisite Essences, 4 Iridescent Tears, 7 Tome of Secrets
Down from 72,059g, 25 Exquisite Essences, 4 Iridescent Tears, 7 Tome of Secrets
Exalted Fine: Sovereign Greaves, Sovereign Vambraces
Now requires 42,416g, 20 Exquisite Essences, 4 Iridescent Tears, 6 Tome of Secrets
Down from 68,926g, 20 Exquisite Essences, 4 Iridescent Tears, 6 Tome of Secrets
Achievements
A new feat of strength has been added for adding the World of Warcraft: Mists of Pandaria Collector's Edition to your Battle.net account. The achievement awards a sigil and accent for your banner.