I recently bought the Canon Pixma 9000 mark-II printer, and the results are stunning. However, I'll cut right to the problems:
First off, the greens (that of foliage and plants) is coming out rather yellow-tinted, despite efforts made to correct it. I've tried changing settings in both the printer AND Lightroom (what I print with) to no avail. It's proving difficult to get rich/deep greens.
Secondly, the Green ink-tank, even after 50+ pictures, is still 100% full. Even on inspection it is completely full. I'm starting to assume that the printer is using a mix of Cyan and Yellow to make green rather than using the green ink-tank. (This is also supported by the fact that they yellow emptied rather fast)
I may be having an ignorant moment, but any information is appreciated!