Using a dual display -- one side Mac, the other side a crappy ViewSonic. I've been using the ViewSonic side of the set-up for pallet windows, chat screens, and so on. But recently, I put the web browser window to the ViewSonic side while previewing my DA gallery... the colors of my work show ungodly awful.
I hope many of you can see the vividness of my color schemes, and not the muddy mix of bleak reds and blues I get from my lesser screen. I really don't have the time to calibrate my uploads for web specific colors.
The difference is night and day.