Is this a Mac or PC ? If it is a PC, what videocard do you have ? I'm not certain, but the 'white dots' may be an effect of some anti-aliasing settings. You may want to experiment with whatever settings you have in the control panel/utility for your videocard. If 'triple buffering' is available as a setting, enable that (though it may not make a difference to this particular issue). Try disabling any antialiasing/smoothing settings. With Nvidia, you can make a specific set of settings for each program/game.
