Right, I first noticed this bug on a modded game but it was persistent on an unmodded game.
The game rapidly consumes more ram then it should (up to a staggering 15gb of my 16gb capacity) when in the VAB and hangar. Firstly it starts at about 2gb (which I think is a pretty ok level for it to be at) but once in the vab the amount of ram allocated increases at an exponential rate, From about 1gb/m to almost 4gb/m, and as a result it freezes and I have to close the game from the task manager... any clue as to why this happens?