[Jamo]

Paul--I noticed the same thing when I first got the Butler (same setup on everything you listed) during autocrossing--though in that venue I tend to run about four pounds more in the front compared to the rear, and it was on Hoosiers bias ply tires (32/28 usually).

I got a four wheel alignment with the rear slightly (very slightly) toed in and it disappeared. Very linear tracking after that at the limits and beyond.