Not really sure what to call it.....

[Cybnext_Design]

Like everytime i switch a server, i have to alt+enter the window just so the graphics at the bottom dont mess up. Im not really sure why this happens. I have DirectX8, would that be a problem?
If anyone knows what causes this please tell me....It also happens when i am fullscreen in the editor and click Play, i have to alt+enter graal so it doesnt show messed up....Also i play fullscreen at 640x480.