Balance
PROTOSS
Archons are now a massive unit.
Pylon power radius has been decreased from 7.5 to 6.5.
Cybernetics Core
Research Warp Gate time increased from 140 to 180.
Gateway
Sentry train time decreased from 42 to 37.
Stalker train time decreased from 42 to 37.
Zealot train time decreased from 38 to 33.
Warp Gate unit train times remain unchanged.
TERRAN
Ghost
Cost changed from 150/150 to 200/100.
Salvage resource return reduced from 100% to 75%.
ZERG
Spore Crawler
Root time decreased from 12 to 6.
Bug Fixes
Fixed a bug where Ghosts could not quickly EMP the same location.
Fixed a bug where players were still able to stack flying units on top of each other.
http://us.battle.net/sc2/en/forum/topic/1213111662
PD:
Patch 16: Zealot build time increased from 33 to 38.
Patch 17: Zealot build time decreased from 38 to 33.
Patch 1.1.0: Zealot build time increased from 33 to 38.
Patch 1.3.3: Zealot train time decreased from 38 to 33.