2002 V70 seems to buck from a total stop

[JAMiller]

I just purchased a 2002 V70, I have had Volvo's forever and I really have never had a problem. This is the first used car I purchased. I noticed that after the car warms up, and while I am driving and come to a total stop, When I release the brake and accelerate the car seems to pulse like the brake is slow to release. After the first second or two the car seems normal again. Bucking may be a better word.