Mine was attributed to my lower control arms being torqued out of spec. I forget what the spec is but there's a couple threads on it. If you don't have a torque wrench autozone may "lend" you one.
I'll check that out, but I was leaning towards the problem being attributed towards the calipers/other parts of the brake shifting once I shift gear from Park/Reverse/Drive. Would be great if the issue was just an out of spec torque amount.