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)