StarCraft II 1.5.4(24540)
StarCraft II: Wings of Liberty patch 1.5.4 is now live. This patch includes systems improvements and bug fixes.
 
Read the full patch notes below to learn about these changes.
 
Bug Fixes:
 
General:
 
Several improvements have been made to address an issue where players would load into a game slightly later than other players. Additional details regarding this are in this forum thread.
Fixed an issue that occasionally caused stuttering in the middle of a game.
Fixed a rare issue that caused prevented players launching the patched client without an Internet connection from accessing features in Offline Mode.
Fixed an issue preventing some custom minimap icons from displaying properly in Arcade games.
 
Editor:
 
The trigger module should no longer stall for long periods of time when adding or removing actions.
 
Races:
 
Protoss:
Structures built within the power field of a Pylon of an ally who disconnects should no longer remain powered when that Pylon is destroyed.
 
http://us.battle.net/sc2/en/blog/8441645/Patch_154_is_Now_Live-1_15_2013