Heya, and thanks for trying to help! It was thanks to your settings way back in the thread I was able to correct the blue tint, so I already owe ya!
I'm assuming you meant the EDID color temperature setting in CCC, under My Digital Flat-Panels -> Display Color? It was unchecked, and the slider was at 6500K. I tried unchecking it out of interest, and it made everything look yellow... not sure if that's common behavior.
Yep, that's the one.
You can try doing a factory reset on the screen as long as you remember your settings for brightness, contrast and custom color and see if that helps.
It's strange that VGA looks better (in terms of colors) than DVI.
Have you tried Display Port? It's too bad the screen doesn't come with the appropriate cable.