why cant you post in one of the other 20gazillion 1.5 patch threads ?
2.2 wont be deplayed by 1.5 unless they made any unforeseen change since the beta3 of patch 1.5 (we tested with that and no problems).
same with 2.15 it should be compatible with 1.5 patch
if you wanna be on the save side download the 1.5 patch but wait to install until you get and official ok from the devs.
should be on the news page then.
