  In a paper submitted to the Arxive some time ago (cond-mat/0509270), R. S.
Fishman et al. considered double-exchange model on a Bethe lattice in infinite
dimensions using dynamical mean-field theory. We present a somewhat different
derivation of their general formula for the magnetic disorder - order
transition temperature and comment on the interpretation of the intermediate
(between ferromagnetism and antiferromagnetism) phase obtained by the authors.
