This, most probably, fixes the 64bit client crashesh of the previous patch (15677)
Armored Druid Bear Forms (thanks to Incarnation)
New Items-> WoWDB
Black Market Auction House Active, Achievement Changes, Spell Changes, New Maps, Client Strings and more
You can find more information about the 15689 build at
WoWHeadNews.com
MMo-Champion
The last server maintenance fixed the problems with the 64bit Beta client (it was crashing at the character selection screen). Blue post about that: here.
- Several legendary quality Sha artifacts:
Breath of the Black Prince, 
Sigil of Power, 
Chimera of Fear, 
Sigil of Wisdom - Secondary professions will scale accountwide:
Grand Master Cookbook and so on - New hunter pet types:
Rest (Porcupines) and 
Surface Trot (Water Striders) - You will be able to blacklist maps in PvP, though we're unsure of what this means:
- ERR_PVP_BLACKLIST_CAP = "You have already blacklisted the maximum number of maps."
- ERR_PVP_MAP_NOT_FOUND = "Blacklisted map not set.";
- New Fishing quest items--possibly for dailies or even a new tournament.
- Gathering will be quicker in Mists of Pandaria:
Forager's Gloves - New scenarios: A Brewing Storm and Big Beach Brew Bash
- New Title: The Zookeeper
- New Glyphs, including many new Shaman vanity ones.
- New Engineering Tinker:
Cloak Tinker: Goblin Glider - New Shield Spike:
Ghost Iron Shield Spike - New Weapon Chain:
Living Steel Weapon Chain - New Fishing chair:
Nat's Fishing Chair - New Abilities, many for new
Hunter pet types - Scenario and PvP Achievements are in, like
Beat the Heat, 
For Display Only, 
Master of Silvershard Mines.
Armored Druid Bear Forms (thanks to Incarnation)
New Items-> WoWDB
Black Market Auction House Active, Achievement Changes, Spell Changes, New Maps, Client Strings and more
You can find more information about the 15689 build at
WoWHeadNews.com
MMo-Champion
The last server maintenance fixed the problems with the 64bit Beta client (it was crashing at the character selection screen). Blue post about that: here.
