  We present analyses of event-by-event dynamical net charge fluctuations
measured in 130 and 200 GeV Au Au collisions with the STAR detector. The
dynamical net charge fluctuations are evaluated using the $\nu_{+-,dyn}$
observable. Dynamical fluctuations measured in Au Au collisions at 130 and 200
GeV are finite, and exceed charge conservation limits. They deviate from a
perfect 1/N scaling and provide an indication that the collision dynamics
varies with collision centrality.
