Part of Beta 26's changelog:
Guild leave/destroy without personal id - fixed
Trade hack - blocked
Guild notice sql injection - fixed (directly in gs).
Pk bug - fixed (limit of 100 kills removed)
Post command delay option - added
Spoof hack - fixed
Disconnect hack detection - improved
Trade with npc crash - fixed
Sky event monsters respawn - fixed
Quest system - improved. No more crashes & negative quests, hopefully.
Elf arrows will no longer decrease (and then increase) when DecreaseElfArrows is set to 0
Happy hour event - fixed
Performance improved by 80%, sql queries reduced by 60%
2nd level wings success rate option - fixed
Blood castle reward according to the room level - added (example: bc1 - box+1, bc2 - box+2, blah blah, bc6 - box+5)
Mana shield maximum percentage option - added
Npc buffers (swell of life, mana shield, elf buffs) - added
/pet command - added
Swell of Life (bk buff) formula options - added
Planned:
New jewels
Mobs hp bar
/mail command - (/mail send <name>, /mail read, /mail clear)
English translated gameserver logs
Release date - no eta at the moment