The game defaults to 1280x720 (720p) which is a 16:9 aspect ratio display resolution. This may cause issues with some 4:3 aspect ratio monitor and GPU devices. In this case, you have to ensure that your GPU tools (e.g. AMD Catalyst Control Center) is set to maintain the aspect ratio for the 4:3 resolution (e.g. 1280x1024) selected.
If you have screen resolution issues; for example you are unable to change the resolution, the game crashes when you change resolutions, your resolution remains locked regardless of what settings you use etc, then you can try some steps to fix this.
Please check to make sure that your video card drivers are up to date. If not, update and then reboot before restarting the game
Locate the LOD.config file and delete it. This KB50 article shows you how
Start the game so that a new LOD.config file is created
Locate the newly created (from step #3) LOD.config file, right-click on it and click "Open". When prompted, choose Notepad as the program to open it with
At the top of the file, locate the <Fullscreen> or <FullScreenWindowed> lines (see example below)
Change the 0 on either <Fullscreen> or <FullScreenWindowed> lines to a 1 to enable fullscreen or windowed fullscreen
Change your resolution numbers in <ScreenWidth> and <ScreenHeight> to fit the resolution you want to run the game at.