[Scribus] PDF color shift problem ?

[stu seven]

+  Last week, I inquired here about  CMYK  and it's possible use
in Scriubus... this week, I've found something related, and wanted
to ask if anyone had experienced the same.

     The link following is to a page with a brief description, and the
two pictures to compare... basically, an image in my output *.sla
document changes drastically when output to PDF... possibly good,
or not ?  Click link for further:

              http://stu7seven.googlepages.com/picdiff