Hi, i am having this same problem, i thought it was due to a recent patch they launch it a couple of weeks ago, but they ignore the problem and i started searching for problems related to the Graphic card, although i think it is their fault.
NOTE: I use Dual Screen, and since i was having problems with this i was using FULL SCREEN option, and when the game launches the rest of my background applications runing maximized go offscreen as well, or a bit to the left the same width the game itself. What program do you use? WinSpy? gonna check it out, but prefer to resolve the problem by the root and not with other programs :S example 1 example 2