  Reassessment of the critical temperature and density of the restricted
primitive model of an ionic fluid by Monte Carlo simulations performed for
system sizes with linear dimension up to $L/\sigma=34$ and sampling of $\sim
10^9$ trial moves leads to $T^*_c=0.04917 \pm 0.00002$ and $\rho_c^* =0.080 \pm
0.005$. Finite size scaling analysis based in the Bruce-Wilding procedure gives
critical exponents in agreement with those of the 3d Ising universality class.
An analysis similar to that proposed by Orkoulas et al [Phys. Rev. E 63, 051507
(2001)], not relying on an a priori knowledge of the universality class, leads
to an unaccurate estimate of $T_c^*$ and to unexpected behavior of the specific
heat and value of the critical exponent ratio $\gamma/\nu$.
