I'm using mac os 10 and doing a 'save as' from illustrator cs to pdf using Acrobat 6. The pdf image differs from the illustrator file, in that a vector outline is now heavier and darker on the pdf. Also the colours of the pdf image are more saturated. I have set-up the colour preferences to be the same in illustrator and acrobat by using (cmyk) U.S. Sheetfed Coated v2. Can anyone please tell me if I've overlooked something that would explain this difference? H E L P!!!