  We point out that an erroneous derivation in the recent paper [Fetecau et
al., Nonlinear Anal. RWA 12 (2011) 1] yields a correct solution by accident.
Additionally, a number of misrepresentations and inaccuracies in the latter
recent paper are identified, corrected and/or clarified in this Comment.
Finally, a listing of recent papers in this journal that make a mistake
applying the Fourier sine transform, and thus present erroneous solutions, is
given as an Appendix.
