Woke my C2D MBP from sleep to find a horrendous blue tint to the screen, googled it and found it is a fairly common problem but none of the solutions that seemed to work for everyone have worked for me. Tried the terminal command, tried turning a screensaver on and then off, tried ctrl-cmd-eject to restart the screen - nada.
Any ideas?
Does this mean it's hardware? 
Any ideas?