Re: convert anomalies.

ImageMagick basically is a bitmap graphics manipulation program. It can 
import some vector formats, but you cannot create a genuine vector 
graphics format as output. When you create a PDF, it's a PDF shell 
wrapped around a bitmap.

As as test, I converted a PDF to CMYK PDF with IM on my computer and 
then typed

identify -verbose test.pdf

into a DOS box. (Identify is another one of the IM command line tools) 
and said that the colourspace is CMYK.

Wolfgang Hugemann