Unfortunately this graphical problem is only present when running the game in XP with some new cards (the Nvidia 4XX series for one) and no fix is available to this date.
Look here:
http://forum.1cpublishing.eu/showthread.php?t=19777
http://forum.1cpublishing.eu/showthread.php?t=21165
Going to Windows 7 seems to be the only solution
AT THE MOMENT, but we still haven't heard a word from the devs about this...