Abstract
It is noted that the vast majority of Galactic PNe are located outside of the interstellar reddening layer, to the extent that local gradients in E_{B-V} are low to undetectable. This is likely to invalidate certain previous estimates of their reddening distances D_{RED}. It also means that larger scale analyses, such as those of Pottasch (1984) and Acker (1973), lead to values of D_{RED}] which are significantly too small. A similar critique applies to analyses based on measures of Na D-line absorption, and it seems likely that most of the distances of Napiwotzki & Schönberner (1995) are similarly in error.
