It is accepted that the transferred electron in the lowest-excited (3)MLCT states of [Ru(bpy)(2)(bpz)](2+) is localized on the bpz ligand. We have investigated the luminescence spectrum of the complexes [Ru(bpy)(2)(bpz)](2+) and [Ru(bpy-d(8))(2)(bpz)](2+) in the [Zn(bpy)(3)](ClO4)(2) host with great precision, and we are able to unambiguously identify sidelines associated with the spectator bpy/bpy-d(8) ligands over the entire vibrational frequency range. Thus, the mere presence or absence of high-frequency vibrational sidelines in (3)MLCT emission cannot be used to argue for delocalization or localization of the transferred electron. Dominant sidelines reported previously by another group for [Ru(bpy)(2)(bpz)](2+) in [Zn(bpy)(3)](ClO4)(2) are due to a contamination of the sample with the chromophore [Os(bpy)(2)(bpy-d(8))](2+).