The x64 crash is weird and seems to appear randomly,I've been playing with x64 since weeks without any problems,I could be playing 6h non stop easily,now I can barely hold 5 minutes,since this times I've removed some mods and created a new save,so I really doubt it's caused by an out of memory error,this is mostly noticeable because sometimes I crash while just flying a probe in orbit,and that usualy doesn't crash the game,unlike loading,or going in the VAB,so this crash is really really weird,let's hope that the win x64 0.90 version will be stable...