Kerbal Space Program

Testing against the stock game (on win 7 64 bit) with a very simple 4 part rocket I noticed that a parachute caused a large amount of instability when attempting to turn (eg gravity turn) inducing unrecoverable somersaulting in the rocket. I tried various items of similar or higher mass/drag in the same position but they did not provoke any such instability. I went back to the mk 16 parachute, copied the part.cfg and started changing it's values in an attempt to narrow down what the problem was. In the end it proved to be none of them. My final test flight had a small mass, no drag over 0.2 (not even opened) and yet the instability still occurred. I can only conclude that the problem is inherent in parachute objects in general - ie in ModuleParachute.
Of note is that when I loaded my other GameData containing FAR, the issue was much less pronounced to the extent that the rocket did not have to abort. Not a huge priority problem since it's easy enough to work around in stock with reaction wheels etc but worth knowing about.

To reproduce: probodobodyne OKTO2, FL-T800 fuel tank, LV-T30 engine and the parachute on top. Config values I ended up changing:

mass = 0.05 (was 0.1)
angularDrag = 1 (was 3)
stowedDrag = 0.2 (was 0.22)
semiDeployedDrag = 0.2 (was 1)
fullyDeployedDrag = 0.2 (was 500)