I have problems with printing pure magenta and cyan. Magenta prints reddish brown, cyan prints darker blue. I print from the iMac PDF The PDFs are printer compliant. It has been cleaned, and a test pattern printed, and printed directly from Openoffice by Apache. Everything is OK there. I have reported it to Canon, but they seem to want me to waste my ink and cleaning cartridge. Apparently they have no idea why this is happening. I must have created over 50 PDFs with different settings, but the colours are always printed incorrectly. I hope someone knows which profile or settings to use. My PDFs are printed correctly at my workplace with a large laser Konica copier.