[magick-users] PostScript-Bug in IM 6.3.1?

[Hugemann]

In my e-mail from 6th of December, I announced the following solution to 
get a transparent canvas when converting a vector EPS file:

convert -density 300 -channel RGBA logo.eps logo.png

(And, yes, I took this somewhere from Anthony's website.)

When trying to share this solution with others, I ran into trouble as 
this seemed to work only on the very computer I was working on. After 
hours of research work I could finally nail the problem down:

The above works with IM version 6.2.5, but not with the current version 
6.3.1!

I am working on Windows machines and using GPL GhostScript 8.15. I 
installed IM from the standard Windows Installer packages

ImageMagick-6.2.5-5-Q8-windows-dll.exe
and
ImageMagick-6.3.1-0-Q16-windows-dll.exe

...............

But there are questions left: How does IM know what PostScript delegate 
to use and what program path to use? In the configuration file 
delegates.xml the generic name @PSDelegate@ is used. You can find out 
about the PS delegate by typing

identify -verbose test.eps

because the PS delegate is listed at the end. But I could not identify 
but what strategy IM finds out about the PS delegate.

Wolfgang Hugemann