User blog comment:Mikachuu9/Bug/@comment-3109473-20111222192733

I suppose you could use alt+tab (or cmd+tab if Mac) to change to your desktop and see if anything weird is going on while the game loads. It seems like a graphics glitch to me. Is your computer 2008+? If not, then it's a bit self explainable if it's a laptop. Anyway, ensure you have the latest DirectX or OpenGL, update your graphic card's drivers and do general maintenance. If the problem persists, I recommend contacting support.