The problem is that there is some sort of red shadow around all letters. I don't know how I can describe it accuratly but it looks like if the "red" from RGB is shifted a little compared to the green and blue.

The monitor is connected to the graphics card with a DVI cable.

There are dozens of different settings you can adjust in the ATI Control Center and the monitor menus but I do not know which setting is the one that helps with my particular problem. The documentation was not much help either, there was no troubleshooting section.