  The papers [1,2] consider unbinding of a disordered heteropolymer. They find
the first order phase transition [1] when disorder is strong (i.e. the ratio v
of the binding energies is large; in DNA v is~1.1) and the Griffiths
singularity, i.e. infinite order transition, otherwise [2]. The problem is
important, since many physical phenomena map onto the same model (see refs. in
[1, 2]). Drastic non-universality in the strength of disorder is unanticipated.
Unfortunately, both titles are misleading: they claim the results which are
proven for homopolymers only.
