I have been using a Canon S820 with 3rd party inks for some time and have not had any problems until the last three days. I bought an S820D on eBay and put it into the system, XP pro, usb connection. The S820D printed very dark prints even with Canon OEM ink cartridges, the previous owner vows it was printing just great, and I tend to believe him. So I put the S820 back into the system, downloaded the new printer driver from Canon and started printing really green photos. I have not been able to find instructions in the manuals for correcting this problem and am feeling inadequate. I guess I need data on how to change the color output for these printers. At first I thought it was just the S820D malfunctioning, but after I put my S820 back into action and it was acting green, I knew I was in over my head. When I first installed the S820 it was seamless and it started printing just fine right out of the box. Any help would be appreciated. I follow directions quite well. Thanks. Jack