  We report on new radio measurements of Galactic planetary nebulae, aimed at
resolving the controversies on the reliability of older VLA flux densities and
the suggested deviations from the standard Galactic extinction law found for
planetary nebulae. We show that for faint ($<$10 mJy) objects observed at high
angular resolution, previous determinations are indeed too low. For the bright
objects we find no significant differences. The new values are the most
accurate flux determinations yet for planetary nebulae, reaching 1\% for the
brightest objects in the sample. Based on the new data, we confirm that there
is a systematic difference between the extinction derived from the
radio/H$\beta$ flux ratio and derived from the Balmer decrement, which led to
the suggestion of deviations from the standard extinction law. However, final
confirmation of this has to await the availibility of more, accurate
measurements of the Balmer (and/or Paschen) lines.
