Arny,
According the the following link (Ghostscript Bugs), Ghostscript 8.64 is broken when using color laser printers. I can verify that statement as being true. Unfortunately, Slackware current is still using this version of GS. If this version continues through the final release, can you replace it or at least offer another version of it that does work with color laser printers? I thank you.
http://foo2qpdl.rkkda.com/INSTALL