Patch 15 is now LIVE!!!
Source:
http://forums.battle.net/thread.html...21&sid=5000#18
Not sure what "decreased from 1 (+1 light) to 1" means? Maybe the upgrade added damage only to light units or both +1 damage and +1 to light for a total of +2 to light? Either way slight siege tank nerf which I think is fine since them en-mass are really good and a buff to reapers which is kind of odd but maybe they want them to see play more then just a quick bum rush and never made again?
Brood Lord change is meh, as I don't see many, if any, zerg players make those and even then they are still powerful even with the slight upgrade nerf nontheless.
Surprised no Protoss changes but no buffs and no nerfs :D