  In a recent paper, McLure & Jarvis (2002, astro-ph/0204473, v.1) reanalyze
AGN broad-line reverberation measurements presented in Kaspi et al. (2000).
They find the broad-line region size and the AGN luminosity at 5100 Ang can be
related by R_{BLR} ~ L_{5100}^{0.5}. This differs from the result of Kaspi et
al., who found R_{BLR} ~ L_{5100}^{0.7}, a departure from expectations for a
constant ionization parameter. In this note I investigate the source of the
discrepancy. McLure & Jarvis use quasar luminosities based on the single-epoch,
multichannel-spectrophotometer measurements of Neugebauer et al. (1987),
obtained in 1980. I show that the Neugebauer et al. fluxes are systematically
higher, by a constant flux offset, compared with the multi-epoch CCD
measurements of Kaspi et al., obtained concurrently with the echo-mapping
radii. In addition, McLure & Jarvis erred when converting these fluxes to
luminosities. The two effects compound to a typical factor 2 (0.3 dex)
overestimate of the luminosities of the PG quasars in the sample. Since McLure
& Jarvis did adopt the Seyfert luminosities in Kaspi et al. (2000), they
obtained a slope that is flatter by 0.2.
