  We present computer simulations of anomalous diffusion, $< r^2(t) > \sim a
t^{1-\delta}$, in two dimensions. The Monte Carlo calculations are in excellent
agreement with previous renormalization group calculations. Interestingly, use
of a high quality pseudo-random number generator is necessary to observe the
anomalous diffusion. A linear-feedback, shift-register method leads to
incorrect, ballistic motion of the random walkers.
