Fast User Switching Color Fix... Under Mac OS X, when you switch user using the Fast User Switching feature, ColorSync gets lost and the colors on your screen suddenly become ugly. To get the right color management back, you just need to run DMProxy, which is somewhere deep in your hard disk.
I wrote a 2-line script to run DMProxy. I suggest you put in your Utilities folder, you can also add it to the "start with session" list.
Here is the source code if you prefer to write the script by yourself:
do shell script "/System/Library/Frameworks/
[first line is "do...", second line is just "quit"]