The only way you should make a PDF from quark is printing to a postscript file, and then put this file through Distiller. Any other method, including printing to a PDF printer, will give you mixed results. I have had very bad colour management problems with the PDF 8 driver, PDF 6 works the best. I use Quark 6 on a daily basis, and prepare ads for publications, and by printing to postscript, and putting it through Distiller, I NEVER have a problem. It is always as designed.