Many of us hav had the problem with patch 1.4 , by loading a map, ending in up all the way back to the desktop.
Here is what a buddy of mine tried out.
he just installed the patch 1.4 again, Yes only the patch, and it worked again. you see, you can install 1.4 as many times as you like. No uninstall of the game, just install 1.4 again!
And again if you get the same problem. I know this sounds stupid, but it`s the easyest way.
SEE YOUR ASS OUT THERE ON THE BATTLEFIELD!!!!!!!! :ROCK: