nothing too crazy but one notable point is 'tax on vending items'.
I know KRO has been suffering from inflation of zeny due to various reasons.. and tax on vending items are their solutions...
few others were general improvements on party UI, shortcut interface change, and some changes to help new players understand the game easier..
below is link to those notes.. its in korean but they have some screenshots that pretty much explains itself.
http://ro.gnjoy.com/...96823&curpage=1
have fun !