  We reconsider a model introduced by Bak, Chen, and Tang (Phys. Rev. A 38, 364
(1988)) as a supposedly self-organized critical model for forest fires. We
verify again that the model is not critical in 2 dimensions, as found also by
previous authors. But we find that the model does show anomalous scaling (i.e.,
is critical in the sense of statistical mechanics) in 3 and 4 dimensions. We
relate these results to recent claims by A. Johansen.
