In case the update message does not appear, hit Ctrl+F8 and type the command
Upd_checkforupdates 1
Expected Garena HoN Server Down Time:
7:00AM to 9:59AM, GMT+8, November 2, 2011
What's New?
New Hero: Gemini
Alt Avatars: Cleopatra Pharoah and Heavy Metal Rhapsody
For those missed it: Ronin Swiftblade Voice