This is a surefire method that became the final solution for me. My friends have used the same method when they came over for a LAN night. We use 64-bit systems.
The only thing it did not fix for me (and probably won't for anyone else) are the icons in ICCup channel, the ones that shows the rank of the respective person in the player list.
Download Win7 32bit / 64bit color fix (registry file)
How to use it:
Determine which kind of Windows 7 you are running. To do this: Click on the Windows button (Start Menu), hover your mouse over 'Computer' and right-click on it. Click Properties.
The System window should pop up, and here it should say that you are running either 32-bit or a 64-bit Windows 7.
Once you've found out which version you are running, extract the downloaded zip file, double-click the registry file that corresponds to your Windows version and hit OK when prompting.
.I hope this helps.