  The recent experiments reported by Borisenko et al. (cond-mat/0305179 v2),
are examined in light of the conditions to be satisfied in the search for
time-reversal violation by circularly polarized ARPES. Two principal problems
are found: (1) A lack of any evidence for the magnitude of the pseudogap or the
temperature of its onset in the samples studied. (2) A difference in the
dichroic signal at low and high temperatures. The difference is greater than
the stated error bars and is contrary to the conclusions reached in the paper.
