[magick-developers] Default settings for convert

[duc.sequere.aut.de.via.decede at imagemagick.org]

> Do you have an idea what is so different for .png and .ppm file generation

Clueless right now.  For bug reports its always helpful if we can reproduce the
problem.  We seem to be using the same releases, ImageMagick 6.4.2-1 and
Ghostscript 8.62.  ImageMagick 6.4.2-2 will be released in a day or two.  You
can give that a shot.