Courtesy of the following source:
http://www.reignofgaming.net/news/21...23-2012-syndra
Includes:
New Sona Skin - Arcade Sona
Syndra
Buffs
Evelynn - Ult CD is now 120/90/60 from 120/100/80 , W CD to 15 at all ranks,, Q mana cost down, E range increased
Ezrael- Mana cost on Mystic Shot decreased slightly each rank
Twitch- Expunge dmg increased, mana cost decreased
Ziggs- Mega Inferno Bomb minimum damage increased to 80% from 75%
Vayne and Swain are in those notes but changes are not there (perhaps an error )
Nerfs
Alistar - Movespeed to 300 from 305, headbutt range to 600 from 650
Diana-HP5 to 6 from 9, Q ratio + base dmg decreased, W damage slightly decreased, Ult CD increased slightly
Ezrael-Base damage on Essence Flux reduced, AP ratio increased by 0.1
Gragas- Mana cost on Body Slam increased from 50 to 75.
Graves- Quickdraw now gives 10% less attack speed than before at each rank
Karthus - Wall distance is no longer mentioned (may be static at all ranks, unclear in the patch notes RoG has) , Wall now lowers only Magic Resistance by 15%- the movespeed reduction is the same as before. Wall no longer reduces armor.
Nunu- Ice Blast debuff lasts 3 seconds, down from 4
Shen- Shadow Dash CD increased at earlier ranks (16/14/12/10/8) from 10/9.5/9/8.5/8
Corki- Passive now deals bonus true damage each auto attack (previoulsly did 10% of his total attack damage as bonus true damage). I'm guessing this is a flat amount and scales per level. Valkyrie CD increased to 26/23/20/17/14 from 20/18/16/14/12.