I mainly print black and white. I've gone through the black ink cartridges more than any other. No colour casts for me. All my prints have been perfect.
It seems strange that there would be colour casts as it shouldn't be using coloured ink, and I think that would either hint at something to do with software settings.
The latest post in the topic Ashley linked is going towards software settings rather than the printer being at fault:
"I know I've dredged up an old thread, but I have to say I never really sat down and try to get this **bleep** printer to print really good BW photos. I spent all day yesterday finally going through some threads and I tried two things that made a huge difference. Moving everything to Adobe RGB and also in the printer dialog, under the Main tab and then Color/Intensity set to Manual and then set Matching to "None". That has made a huge difference in both my BW and color pictures. I have a calibrated monitor and on my old Epson I didn't have these issues, but finally I think I have it all nailed down... gawd it's been a long time battling with this printer!!!!"
and on the previous page its saying the black and white photo print box is the problem for green casts:
"That is about the same as I found a slight green tint, it is very slight but I can see it. This happens when I check the "Black and White Photo Print" box."