  We have studied the 90 degree VV-polarized Brillouin scattering spectrum of
the molecular glassformer salol and observed a previously unnoticed VV-dip
feature at low frequencies for temperatures above 300K. This new feature is a
consequence of rotation-translation coupling, as recently predicted by Pick,
Franosch et al [Eur. Phys. J. B 31, 217, 229 (2003)], who showed its
relationship to the Rytov dip that occurs in the corresponding VH spectrum. The
analysis of the spectra shows good agreement with the theoretical predictions.
