Hi there! I am sorry if i had posted in a wrong place! I have a Canon printer which prints coloured dots in grayscale mode. I selected all the options which are related to this problem and nothing solved the problem....I found out that if i check the duplex option this problem occurs and if i don't select this option the coloured dots don't appear in grayscale mode. Can this problem came from the Windows driver or Windows print wizard...? I have the Canon driver installed and i have Windows 7. Please help me... Thankyou anticipated!