The costs for following buildings were changed (metal/mineral/Vespene):
· Alliance Station: 600000/500000/50000 → 350000/400000/250000
· Space Station: 1500000/1000000/100000 → 1000000/800000/500000
· Gravity Gun: 2000000/1000000/200000 → 1600000/800000/600000
· Dunkleosteus: 3000000/3000000/0 → 3200000/2250000/800000
· Insectoid Entity: 200000/1100000/50000 → 200000/900000/300000
· Wormhive: 400000/300000/0 → 400000/250000/50000
· Powerous of Tosses: 13000000/1500000/0 → 8000000/2500000/1000000
· Armorous of Tosses: 3000000/1000000/0 → 3200000/700000/300000
· Attackus of Tosses: 3500000/400000/0 → 1500000/400000/750000
· Shieldus of Tosses: 1600000/1200000/0 → 1200000/1200000/400000

I don't mind at all, I finished the lvl 9 Space Station and lvl 9 Gravity Gun a few weeks ago.
Good luck to those who don't have gas and want to upgrade.

Best regards,
Brutoss