Hello fellow kerbals .last week i reported a problem with the 1.8.1 patch. expansions would not load, then i updated the expansion packs and all was well until i tried to add OPT space shuttle parts then the game would freeze while loading expansion packs . Removed expansion packs it still froze while loading. I am downgrading to 1.7.3 when everything worked. 1.8 has some real nifty artwork while loading and some updated textures but i play in sandbox mode in that i'm an armchair test pilot at heart and don't need any of the advanced game play options. well enjoy your Thankskerbal day folks!