In Most games I have garbage in 2D sprites like those in Castlevania Chronicles next to the Simon sprite here: http://i.imgur.com/tu7rsBi.png
I tried both the HW core with Open GL and the Software Core and tried turning on and off most settings or change them and do a restart after that to make sure they apply but the garbage is always there on the sprites. This happens in most games when 2d Sprites are present.